it's when he casts other spells. turns and kills someone, not related to his hitbox, he just actually turns. this week I got to experience something completely new:
Xaril the Poisoned Mind Tenderizing Strikes Keine 729489 (A: 30526) (O: 75371)
that's his melee atk that leaves the victim to take higher damage from other mobs. however, I am a holy paladin and was standing on the outer ring. the amber pool just spawned, ran out of it but ran sideways. xaril was tanked in the middle. didn't taunt (don't even have it keybound). plus, he also didn't move at all. he just used that ability on range on me and 1 shotted me.
bug free encounter.