Akiri, Fearless Voyager cripples Voltron

In the upkeep phase, the AI repeatedly activates _Akiri, Fearless Voyager_'s ability to make a creature indestructible, tapping it. Given that it carried all the important equipment (vigilance, unblockable, flying, trample, indestructible, lifelink, etc), it should have attacked. _Silent Arbiter_ allows that.

The issues here are:
1. Poor timing; granting indestructible and tapping should only be done when about to be destroyed.
2. Activating it more than once on the same target.
3. A `java.util.concurrent.CompletionException: java.util.ConcurrentModificationException` while pumping the presumed attacker. Here's the possibly-corrupted output from the corrupted terminal in my VS Code that's been running too long. (last upstream commit is 6ddfc45297c1ebba07822c6eb5ded4afbbd8fc5e from 12-12-2025):
<details>
Turn 70 (Grace)
Grace triggered Ring of Thune: At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's white. [Phase: Grace] in UPKEEP
Grace's Stack : Added At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's white. [Phase: Grace]
Grace tapped Sandstone Bridge (191)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Argentum Armor (184) from Balan, Wandering Knight (157)
Grace tapped Balan, Wandering Knight (157)
Grace tapped Plains (173)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Leyline Axe (198) from Balan, Wandering Knight (157)
Grace tapped Plains (195)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Mj├Âlnir, Storm Hammer (158) from Balan, Wandering Knight (157)
Grace tapped Plains (178)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Sigiled Sword of Valeron (154) from Balan, Wandering Knight (157)
Grace tapped Plains (166)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Haunted Cloak (188) from Balan, Wandering Knight (157)
Grace tapped Boros Guildgate (162)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Sword of Vengeance (163) from Balan, Wandering Knight (157)
Grace tapped Plains (165)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Samurai's Katana (211) from Balan, Wandering Knight (157)
Grace tapped Network Terminal (153)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Loxodon Warhammer (223) from Balan, Wandering Knight (157)
Puresteel Paladin (200) : [Grace's Library] -> [Grace's Hand]
Grace tapped Mountain (131)
Grace tapped Mountain (143)
Grace tapped Mountain (134)
Grace tapped Crawling Barrens (206)
Grace tapped Mountain (145)
Grace activated Argentum Armor: Equip {6} ({6}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {6} ({6}: Attach to target creature you control. Equip only as a sorcery.)
Attached Argentum Armor (184) to Valduk, Keeper of the Flame (212)
Grace tapped Mountain (133)
Grace tapped Mountain (144)
Grace tapped Tyrite Sanctum (146)
Grace tapped Mountain (139)
Grace activated Samurai's Katana: Murasame ÔÇö Equip {5}  in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Murasame ÔÇö Equip {5} 
Attached Samurai's Katana (211) to Valduk, Keeper of the Flame (212)
Grace activated Mj├Âlnir, Storm Hammer: Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Attached Mj├Âlnir, Storm Hammer (158) to Valduk, Keeper of the Flame (212)
Grace activated Leyline Axe: Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Attached Leyline Axe (198) to Valduk, Keeper of the Flame (212)
Grace activated Loxodon Warhammer: Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Attached Loxodon Warhammer (223) to Valduk, Keeper of the Flame (212)
Grace activated Sword of Vengeance: Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Attached Sword of Vengeance (163) to Valduk, Keeper of the Flame (212)
Grace activated Haunted Cloak: Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Attached Haunted Cloak (188) to Valduk, Keeper of the Flame (212)
Grace activated Sigiled Sword of Valeron: Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Attached Sigiled Sword of Valeron (154) to Valduk, Keeper of the Flame (212)
Grace triggered Valduk, Keeper of the Flame: At the beginning of combat on your turn, for each Aura and Equipment attached to Valduk, Keeper of the Flame, create a 3/1 red Elemental creature token with trample and haste. Exile those tokens at the beginning of the next end step. [Phase: Grace] in COMBAT_BEGIN
Grace's Stack : Added At the beginning of combat on your turn, for each Aura and Equipment attached to Valduk, Keeper of the Flame, create a 3/1 red Elemental creature token with trample and haste. Exile those tokens at the beginning of the next end step. [Phase: Grace]
Elemental Token (424) : [null] -> [Grace's Battlefield]
Elemental Token (425) : [null] -> [Grace's Battlefield]
Elemental Token (426) : [null] -> [Grace's Battlefield]
Elemental Token (427) : [null] -> [Grace's Battlefield]
Elemental Token (428) : [null] -> [Grace's Battlefield]
Elemental Token (429) : [null] -> [Grace's Battlefield]
Elemental Token (430) : [null] -> [Grace's Battlefield]
Elemental Token (431) : [null] -> [Grace's Battlefield]
Elemental Token (432) : [null] -> [Grace's Battlefield]
Grace tapped Mountain (136)
Grace activated Valduk, Keeper of the Flame: {1}: Valduk, Keeper of the Flame gets +1/+0 until end of turn. in COMBAT_BEGIN
Grace's Stack : Added {1}: Valduk, Keeper of the Flame gets +1/+0 until end of turn.
java.util.concurrent.CompletionException: java.util.ConcurrentModificationException
        at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture.completeThrowable(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.exec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)
Caused by: java.util.ConcurrentModificationException
        at java.base/java.util.ArrayList$Itr.checkForComodification(Unknown Source)
        at java.base/java.util.ArrayList$Itr.next(Unknown Source)
        at com.google.common.collect.AbstractMapBasedMultimap$Itr.next(AbstractMapBasedMultimap.java:1190)
        at forge.game.combat.Combat.isAttacking(Combat.java:348)
        at forge.game.card.CardView.updateAttacking(CardView.java:197)
        at forge.game.card.Card.updateAttackingForView(Card.java:464)
        at forge.game.combat.Combat.addAttacker(Combat.java:273)
        at forge.game.combat.Combat.addAttacker(Combat.java:252)
        at forge.ai.AiAttackController.lambda$7(AiAttackController.java:973)
        ... 7 more
AI Attack declaration invalid, defaulting to: {}
Grace declared attackers: {}
Combat ended. Attackers: [] Blockers: []
Grace triggered Valduk, Keeper of the Flame: Exile Elemental Token (424), Elemental Token (425), Elemental Token (426), Elemental Token (427), Elemental Token (428), Elemental Token (429), Elemental Token (430), Elemental Token (431) and Elemental Token (432) at the beginning of the next end step. ([Elemental Token (424), Elemental Token (425), Elemental Token (426), Elemental Token (427), Elemental Token (428), Elemental Token (429), Elemental Token (430), Elemental Token (431), Elemental Token (432)]) [Phase: Grace] in END_OF_TURN
Grace's Stack : Added Exile Elemental Token (424), Elemental Token (425), Elemental Token (426), Elemental Token (427), Elemental Token (428), Elemental Token (429), Elemental Token (430), Elemental Token (431) and Elemental Token (432) at the beginning of the next end step. ([Elemental Token (424), Elemental Token (425), Elemental Token (426), Elemental Token (427), Elemental Token (428), Elemental Token (429), Elemental Token (430), Elemental Token (431), Elemental Token (432)]) [Phase: Grace]    
Grace's Exile : Added Elemental Token (424)
Elemental Token (424) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (425)
Elemental Token (425) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (426)
Elemental Token (426) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (427)
Elemental Token (427) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (428)
Elemental Token (428) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (429)
Elemental Token (429) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (430)
Elemental Token (430) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (431)
Elemental Token (431) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (432)
Elemental Token (432) : [Grace's Battlefield] -> [Grace's Exile]
Turn 71 (Veronica)
Veronica tapped Plains (44)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Detached Argentum Armor (59) from Indomitable Archangel (92)
Veronica tapped Indomitable Archangel (92)
Veronica tapped Plains (45)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Detached Mj├Âlnir, Storm Hammer (32) from Indomitable Archangel (92)
Veronica tapped Plains (70)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (41)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (53)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (40)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (48)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Sandstone Bridge (66)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (42)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (52)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Boros Locket (85)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (50)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Swiftfoot Boots (72) : [Veronica's Library] -> [Veronica's Hand]
Swiftfoot Boots (72) : [Veronica's Hand] -> [Stack]
Veronica tapped Mountain (5)
Veronica cast Swiftfoot Boots: Swiftfoot Boots in DRAW
Veronica's Stack : Added Swiftfoot Boots
Veronica triggered Armory Paladin: Whenever you cast an Aura or Equipment spell, exile the top card of your library. You may play that card until the end of your next turn. [Card: Swiftfoot Boots (72), Activator: Veronica, SpellAbility: Swiftfoot Boots] in DRAW
Veronica's Stack : Added Whenever you cast an Aura or Equipment spell, exile the top card of your library. You may play that card until the end of your next turn. [Card: Swiftfoot Boots (72), Activator: Veronica, SpellAbility: Swiftfoot Boots]
Veronica's Exile : Added Stonehewer Giant (34)
Stonehewer Giant (34) : [Veronica's Library] -> [Veronica's Exile]
Armory Paladin (91)'s Effect (433) : [null] -> [Veronica's Command]
Swiftfoot Boots (72) : [Stack] -> [Veronica's Battlefield]
Veronica triggered Sigarda's Aid: Whenever an Equipment you control enters, you may attach it to target creature you control. [Zone Changer: Swiftfoot Boots (72)] in DRAW on [Reyav, Master Smith (60)]
Veronica's Stack : Added Whenever an Equipment you control enters, you may attach it to target creature you control. [Zone Changer: Swiftfoot Boots (72)]
Attached Swiftfoot Boots (72) to Reyav, Master Smith (60)
Veronica tapped Mountain (19)
Veronica tapped Mountain (9)
Veronica tapped Mountain (18)
Veronica tapped Crawling Barrens (81)
Veronica tapped Opal Palace (22)
Veronica tapped Mountain (12)
Veronica activated Argentum Armor: Equip {6} ({6}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Indomitable Archangel (92)]
Veronica's Stack : Added Equip {6} ({6}: Attach to target creature you control. Equip only as a sorcery.)
Attached Argentum Armor (59) to Indomitable Archangel (92)
Sram, Senior Edificer (90) : [Veronica's Hand] -> [Stack]
Veronica tapped Ornithopter of Paradise (64)
Veronica tapped Mountain (16)
Veronica cast Sram, Senior Edificer: Sram, Senior Edificer - Creature 2 / 2 in MAIN1
Veronica's Stack : Added Sram, Senior Edificer - Creature 2 / 2
Sram, Senior Edificer (90) : [Stack] -> [Veronica's Battlefield]
Veronica tapped Mountain (13)
Veronica activated Leyline Axe: Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Indomitable Archangel (92)]
Veronica's Stack : Added Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Attached Leyline Axe (73) to Indomitable Archangel (92)
Veronica declared attackers: {}
Combat ended. Attackers: [] Blockers: []
Turn 72 (Grace)
Grace triggered Ring of Thune: At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's white. [Phase: Grace] in UPKEEP
Grace's Stack : Added At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's white. [Phase: Grace]
Grace tapped Sandstone Bridge (191)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Sword of Feast and Famine (190) from Balan, Wandering Knight (157)
Grace tapped Balan, Wandering Knight (157)
Grace tapped Plains (173)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Celestial Armor (203) from Balan, Wandering Knight (157)
Grace tapped Plains (195)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Darksteel Plate (152) from Balan, Wandering Knight (157)
Grace tapped Plains (178)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Maul of the Skyclaves (194) from Balan, Wandering Knight (157)
Grace tapped Plains (166)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Quietus Spike (192) from Balan, Wandering Knight (157)
Grace tapped Boros Guildgate (162)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Swiftfoot Boots (197) from Balan, Wandering Knight (157)
Grace tapped Plains (165)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Prowler's Helm (161) from Balan, Wandering Knight (157)
Grace tapped Network Terminal (153)
Grace activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Grace's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.     
Detached Ring of Thune (183) from Balan, Wandering Knight (157)
Ornithopter of Paradise (189) : [Grace's Library] -> [Grace's Hand]
Ornithopter of Paradise (189) : [Grace's Hand] -> [Stack]
Grace tapped Mountain (131)
Grace tapped Mountain (143)
Grace cast Ornithopter of Paradise: Ornithopter of Paradise - Creature 0 / 2 in MAIN1
Grace's Stack : Added Ornithopter of Paradise - Creature 0 / 2
Ornithopter of Paradise (189) : [Stack] -> [Grace's Battlefield]
Grace tapped Mountain (134)
Grace tapped Mountain (145)
Grace activated Quietus Spike: Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)
Attached Quietus Spike (192) to Valduk, Keeper of the Flame (212)
Grace tapped Mountain (133)
Grace activated Darksteel Plate: Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)
Attached Darksteel Plate (152) to Valduk, Keeper of the Flame (212)
Grace tapped Mountain (144)
Grace activated Prowler's Helm: Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)
Attached Prowler's Helm (161) to Valduk, Keeper of the Flame (212)
Grace tapped Mountain (139)
Grace activated Sword of Feast and Famine: Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)
Attached Sword of Feast and Famine (190) to Valduk, Keeper of the Flame (212)
Grace activated Ring of Thune: Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Auriok Steelshaper (156)]
Grace's Stack : Added Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Attached Ring of Thune (183) to Auriok Steelshaper (156)
Grace activated Maul of the Skyclaves: Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Attached Maul of the Skyclaves (194) to Valduk, Keeper of the Flame (212)
Grace activated Celestial Armor: Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Attached Celestial Armor (203) to Valduk, Keeper of the Flame (212)
Grace activated Swiftfoot Boots: Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Valduk, Keeper of the Flame (212)]
Grace's Stack : Added Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Attached Swiftfoot Boots (197) to Valduk, Keeper of the Flame (212)
Grace triggered Valduk, Keeper of the Flame: At the beginning of combat on your turn, for each Aura and Equipment attached to Valduk, Keeper of the Flame, create a 3/1 red Elemental creature token with trample and haste. Exile those tokens at the beginning of the next end step. [Phase: Grace] in COMBAT_BEGIN
Grace's Stack : Added At the beginning of combat on your turn, for each Aura and Equipment attached to Valduk, Keeper of the Flame, create a 3/1 red Elemental creature token with trample and haste. Exile those tokens at the beginning of the next end step. [Phase: Grace]
Elemental Token (436) : [null] -> [Grace's Battlefield]
Elemental Token (437) : [null] -> [Grace's Battlefield]
Elemental Token (438) : [null] -> [Grace's Battlefield]
Elemental Token (439) : [null] -> [Grace's Battlefield]
Elemental Token (440) : [null] -> [Grace's Battlefield]
Elemental Token (441) : [null] -> [Grace's Battlefield]
Elemental Token (442) : [null] -> [Grace's Battlefield]
Elemental Token (443) : [null] -> [Grace's Battlefield]
Elemental Token (444) : [null] -> [Grace's Battlefield]
Elemental Token (445) : [null] -> [Grace's Battlefield]
Elemental Token (446) : [null] -> [Grace's Battlefield]
Elemental Token (447) : [null] -> [Grace's Battlefield]
Elemental Token (448) : [null] -> [Grace's Battlefield]
Elemental Token (449) : [null] -> [Grace's Battlefield]
Elemental Token (450) : [null] -> [Grace's Battlefield]
Elemental Token (451) : [null] -> [Grace's Battlefield]
Grace tapped Mountain (136)
Grace activated Valduk, Keeper of the Flame: {1}: Valduk, Keeper of the Flame gets +1/+0 until end of turn. in COMBAT_BEGIN
Grace's Stack : Added {1}: Valduk, Keeper of the Flame gets +1/+0 until end of turn.
Grace tapped Tyrite Sanctum (146)
Grace activated Valduk, Keeper of the Flame: {1}: Valduk, Keeper of the Flame gets +1/+0 until end of turn. in COMBAT_BEGIN
Grace's Stack : Added {1}: Valduk, Keeper of the Flame gets +1/+0 until end of turn.
java.util.concurrent.CompletionException: java.util.ConcurrentModificationException
        at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture.completeThrowable(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.exec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)
Caused by: java.util.ConcurrentModificationException
        at java.base/java.util.ArrayList$Itr.checkForComodification(Unknown Source)
        at java.base/java.util.ArrayList$Itr.next(Unknown Source)
        at com.google.common.collect.AbstractMapBasedMultimap$Itr.next(AbstractMapBasedMultimap.java:1190)
        at forge.game.combat.Combat.isAttacking(Combat.java:348)
        at forge.ai.ComputerUtilCombat.combatTriggerWillTrigger(ComputerUtilCombat.java:759)
        at forge.ai.ComputerUtilCombat.combatTriggerWillTrigger(ComputerUtilCombat.java:735)
        at forge.ai.ComputerUtilCombat.predictToughnessBonusOfAttacker(ComputerUtilCombat.java:1402)
        at forge.ai.ComputerUtilCombat.predictToughnessBonusOfAttacker(ComputerUtilCombat.java:1342)
        at forge.ai.AiAttackController.isEffectiveAttacker(AiAttackController.java:277)
        at forge.ai.AiAttackController.lambda$7(AiAttackController.java:930)
        ... 7 more
java.util.concurrent.CompletionException: java.util.ConcurrentModificationException
        at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture.completeThrowable(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.exec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)
Caused by: java.util.ConcurrentModificationException
        at java.base/java.util.ArrayList$Itr.checkForComodification(Unknown Source)
        at java.base/java.util.ArrayList$Itr.next(Unknown Source)
        at com.google.common.collect.AbstractMapBasedMultimap$Itr.next(AbstractMapBasedMultimap.java:1190)
        at forge.game.combat.Combat.isAttacking(Combat.java:348)
        at forge.ai.ComputerUtilCombat.combatTriggerWillTrigger(ComputerUtilCombat.java:759)
        at forge.ai.ComputerUtilCombat.combatTriggerWillTrigger(ComputerUtilCombat.java:735)
        at forge.ai.ComputerUtilCombat.predictToughnessBonusOfAttacker(ComputerUtilCombat.java:1402)
        at forge.ai.ComputerUtilCombat.predictToughnessBonusOfAttacker(ComputerUtilCombat.java:1342)
        at forge.ai.AiAttackController.isEffectiveAttacker(AiAttackController.java:277)
        at forge.ai.AiAttackController.lambda$7(AiAttackController.java:930)
        ... 7 more
java.util.concurrent.CompletionException: java.util.ConcurrentModificationException
        at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture.completeThrowable(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(Unknown Source)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.exec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
        at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)
Caused by: java.util.ConcurrentModificationException
        at java.base/java.util.ArrayList$Itr.checkForComodification(Unknown Source)
        at java.base/java.util.ArrayList$Itr.next(Unknown Source)
        at com.google.common.collect.AbstractMapBasedMultimap$Itr.next(AbstractMapBasedMultimap.java:1190)
        at forge.game.combat.Combat.getBandOfAttacker(Combat.java:313)
        at forge.game.combat.Combat.addAttacker(Combat.java:262)
        at forge.game.combat.Combat.addAttacker(Combat.java:252)
        at forge.ai.AiAttackController.lambda$7(AiAttackController.java:973)
        ... 7 more
AI Attack declaration invalid, defaulting to: {}
Grace declared attackers: {}
Combat ended. Attackers: [] Blockers: []
Grace triggered Valduk, Keeper of the Flame: Exile Elemental Token (436), Elemental Token (437), Elemental Token (438), Elemental Token (439), Elemental Token (440), Elemental Token (441), Elemental Token (442), Elemental Token (443), Elemental Token (444), Elemental Token (445), Elemental Token (446), Elemental Token (447), Elemental Token (448), Elemental Token (449), Elemental Token (450) and Elemental Token (451) at the beginning of the next end step. ([Elemental Token (436), Elemental Token (437), Elemental Token (438), Elemental Token (439), Elemental Token (440), Elemental Token (441), Elemental Token (442), Elemental Token (443), Elemental Token (444), Elemental Token (445), Elemental Token (446), Elemental Token (447), Elemental Token (448), Elemental Token (449), Elemental Token (450), Elemental Token (451)]) [Phase: Grace] in END_OF_TURN
Grace's Stack : Added Exile Elemental Token (436), Elemental Token (437), Elemental Token (438), Elemental Token (439), Elemental Token (440), Elemental Token (441), Elemental Token (442), Elemental Token (443), Elemental Token (444), Elemental Token (445), Elemental Token (446), Elemental Token (447), Elemental Token (448), Elemental Token (449), Elemental Token (450) and Elemental Token (451) at the beginning of the next end step. ([Elemental Token (436), Elemental Token (437), Elemental Token (438), Elemental Token (439), Elemental Token (440), Elemental Token (441), Elemental Token (442), Elemental Token (443), Elemental Token (444), Elemental Token (445), Elemental Token (446), Elemental Token (447), Elemental Token (448), Elemental Token (449), Elemental Token (450), Elemental Token (451)]) [Phase: Grace]
Grace's Exile : Added Elemental Token (436)
Elemental Token (436) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (437)
Elemental Token (437) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (438)
Elemental Token (438) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (439)
Elemental Token (439) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (440)
Elemental Token (440) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (441)
Elemental Token (441) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (442)
Elemental Token (442) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (443)
Elemental Token (443) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (444)
Elemental Token (444) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (445)
Elemental Token (445) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (446)
Elemental Token (446) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (447)
Elemental Token (447) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (448)
Elemental Token (448) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (449)
Elemental Token (449) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (450)
Elemental Token (450) : [Grace's Battlefield] -> [Grace's Exile]
Grace's Exile : Added Elemental Token (451)
Elemental Token (451) : [Grace's Battlefield] -> [Grace's Exile]
Turn 73 (Veronica)
Veronica tapped Plains (44)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Detached Argentum Armor (59) from Indomitable Archangel (92)
Veronica tapped Indomitable Archangel (92)
Veronica tapped Plains (45)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Detached Leyline Axe (73) from Indomitable Archangel (92)
Veronica tapped Plains (70)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Detached Swiftfoot Boots (72) from Reyav, Master Smith (60)
Veronica tapped Reyav, Master Smith (60)
Veronica tapped Plains (41)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (53)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (40)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (48)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Sandstone Bridge (66)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (42)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Plains (52)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Veronica tapped Boros Locket (85)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in UPKEEP
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Plains (43) : [Veronica's Library] -> [Veronica's Hand]
Plains (43) : [Veronica's Hand] -> [Veronica's Battlefield]
Veronica played Plains (43)
Veronica's Exile : Removed Stonehewer Giant (34)
Stonehewer Giant (34) : [Veronica's Exile] -> [Stack]
Veronica tapped Plains (50)
Veronica tapped Plains (43)
Veronica tapped Mountain (5)
Veronica tapped Mountain (19)
Veronica tapped Mountain (9)
Veronica cast Stonehewer Giant: Stonehewer Giant - Creature 4 / 4 by Armory Paladin (91) in MAIN1
Veronica's Stack : Added Stonehewer Giant - Creature 4 / 4 by Armory Paladin (91)
Stonehewer Giant (34) : [Stack] -> [Veronica's Battlefield]
Veronica tapped Mountain (18)
Veronica tapped Mountain (12)
Veronica tapped Crawling Barrens (81)
Veronica tapped Opal Palace (22)
Veronica tapped Mountain (16)
Veronica tapped Mountain (13)
Veronica activated Argentum Armor: Equip {6} ({6}: Attach to target creature you control. Equip only as a sorcery.) in MAIN1 on [Indomitable Archangel (92)]
Veronica's Stack : Added Equip {6} ({6}: Attach to target creature you control. Equip only as a sorcery.)
Attached Argentum Armor (59) to Indomitable Archangel (92)
Veronica tapped Ornithopter of Paradise (64)
Veronica activated Akiri, Fearless Voyager: {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.      in MAIN1
Veronica's Stack : Added {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.    

Detached Argentum Armor (59) from Indomitable Archangel (92)
Veronica declared attackers: {}
Combat ended. Attackers: [] Blockers: []
Turn 74 (Grace)
</details>

<img width="2184" height="1158" alt="Image" src="https://github.com/user-attachments/assets/a43f7177-2109-4f8e-a695-dd679b54c2b1" />



Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Akiri, Fearless Voyager cripples Voltron #9366

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Akiri, Fearless Voyager cripples Voltron #9366

Description

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions