You see a sin devourer
Notes
Apppears in the Ferumbras' Ascension Quest with Shulgrax.
Abilities
Mana Drain (100-200), decreases Magic Level in 40-50%.
Damage Taken From Elements
Physical
Death
Holy
Ice
Fire
Energy
Earth
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.