You see a sin devourer.
Notes
Apppears in the Ferumbras' Ascension Quest with Shulgrax.
Abilities
Mana Drain (100-200)
Debuff (Reduces Magic Level
by 40-50%)Damage Taken From Elements
Physical 
Death 
Holy 
Ice 
Fire 
Energy 
Earth 
Drown 
Location
Grounds of Damnation in Shulgrax's room.
Behaviour
Keeps a distance.
Strategy
They can't be killed directly, so to get rid of them you have to kill the Damned Souls first and then use the Purified Souls on the Sin Devourers.
Loot
There is no loot data for this creature. Please consider subtmitting loot logs for this creature using the Loot Statistics parser.