Sabbat the Necromagus

Sabbat the Necromagus, formerly known as Soppi Walters, is a villain in the Judge Dredd comics. He is a powerful, immortal necromancer from the planet Bethsheba who wiped out all life on his home planet, and travels from the future to Earth's past to erase Johnny Alpha's timeline. He is the ruler over a vast zombie army. He serves as the main antagonist of the Judgement Day.

Personality
Sociopathic, ruthless, and omnicidal, Sabbat is considered one of Dredd's most evil foes, along with Judge Death. Holding a morbid fascination for the dead ever since he was a child, Sabbat preferred the company of the dead to that of the living. This obsession lasted into adulthood when he became a necromancer, and unleashed his army of the dead to exterminate all life. He also had an affinity for torturing his enemies, transforming his childhood bully Dennis Mennis into a zombie so he could torment him for eternity, and torturing Judge Dredd's strike team to death.

Trivia

 * Sabbat is one of tfive Dredd villains considered Complete Monsters, the other four being Judge Death, War Marshal "Mad Dog" Kazan, Ma-Ma, and Rico Dredd.