Yynzik the Scornridden
Group was me, Gilly, Goldenflame, Ualraig, Artificer, Arrog.
Successful after 1-2 attempts. Everyone needs to have Noxious Remedy on them. Arcane Remedy might help, but effects did not seem significant. Yynzik also does something to drain mana; seems targeted, not whole group.