No Mercy.

Demonic possession, sex for weeks on end, an eternal lifetime of insanity-driven bloodlust, this is the story of a demon, Zachariah Manchester. First being unleashed upon the world in the 1500's, this demon has been many globally known villains and serial killers, simply disguised behind a strangers face, all the way from Peter Stumpp, a deranged cannibal from the Holy Empire, active from the years 1564-1589, to a now popularized serial killer, Jeffrey Dahmer. Jumping from meat suit to meat suit, he finds himself on the angel's most wanted list. After a long hard journey, at last, it ends with...