The Exorcist is a powerful ally who focuses on distracting and weakening enemies, and healing his teammates. His almost maniacal religiosity translates into particular hatred (and effectiveness) in clashes with Unholy and Eldrich monsters. Under the right conditions, he can also support the party with powerful stress-relieving spells. 

The Exorcist mod was released by Shay, with a help of Darkest Dungeon community.