Corvus was an exiled pit fiend trapped in Ptolus in the body of an imp. Realizing the weakness of his new form, Corvus joined up with the party as the group formed at the gates of the city. He worked with the party while at the same time moving to regain his lost powers and form.

In an attempts to regain favour with the party after a falling out, Corvus went to the Brotherhood of Redemption which specializes in redeeming evil monsters and making them productive members of Ptolusian society. He was partially cured but soon fell afoul of an item that led to his possession by a demon. In a climatic battle in the Dark Reliquary where he regained his pit fiend form, Corvus was ultimately slain by the party but not before killing the party’s cleric, Dmitri.