Magnus the Beast Claw at Writheblood Ruin

[JustAnOkapi]

title is missing from the bosses list
is an invasion that was added in 1.06

related to the second White-Faced Varré quest

[rmongiovi]

Yes. It would be nice if this accommodated offline players who can't do the "three invasions" step in Varre's quest line. You have to postpone that until you get to the Altus plateau and can substitute this invasion.