Mister Sinister

Nathaniel Essex, also known as Mister Sinister, (voiced by Steve Blum) is an enemy for The X-Men, Cable and Deadpool and a powerful supervillain mutant who is bent on creating/becoming a being of genetic perfection and forcing the world's populace into the next step of evolution by weeding out those he believes are weak. He is the archenemy of X-Men member, Cyclops.