Zarnamag

Also known as the Balor of Doubt, Zarnamag is a demon that feeds on self doubt and pain. He presented himself to Wulf in his time of desperation using it to trick him into a deal in which he offered to resurrect Wulf's lost love Darnon Karvius, however this backfired as Darnon's pure soul rejected the dark magic that attempted to bring him back and Wulf's deal was for naught.

As time progressed on and Wulf suffered more with the loss of Darnon his self doubt grew as to whether he was truly worthy of the path he was taking, Zarnamag fed on this and grew stronger ultimately coming to claim Wulf's soul. Internally Wulf fought off the attack while the rest of the Divine Four fought the Balor's material form, ultimately Wulf lost and the party were outmatched when Darnon's soul still drifting came to the rescue and sacrificed his afterlife to eternally fight the demon to allow the others the chance to live on.