You see a damned soul.
Notes
Apppears in the Ferumbras' Ascension Quest with Shulgrax.
Abilities
None.
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
Kill them and use the Purified Soul on the nearby Sin Devourers.