The user either is or can become a revenant, a visible ghost or animated corpse that was believed to return from the grave to terrorize the living. In most cases, revenants come back from the grave for revenge on those who wronged or even killed them, or to harass their families. Revenants are often associated with spreading disease among the living, or even sucking the blood of the living, much like vampires. It should be noted that revenants are sometimes ghosts or spirits, and other times zombies.