Platform, device version and operating system:
Steam, PC, 4.6.0.08
What you were expecting to happen, and what actually happened:
Used Wall of Oblivion on a Boss - instead of only Death Marking all other enemies, it Death Marked the boss as well. (Which I’d be fine with! Only that’s not what the text says.)
How often does this happen? When did it begin happening?
Consistent issue in Dungeon battles so far, but I’ve only had it for a couple of days, and today is the first time I could target a boss with it and note what happened.
Steps to make it happen again
Equip Wall of Oblivion, begin a Dungeon battle against a boss that can be targeted by spells and is vulnerable to Death Mark, charge it up, cast the spell and target the boss.