Dr. Nathaniel Essex was a brilliant Victorian era scientist obsessed with deterministic interpretations of natural evolution predicting the emergency of mutants in the future. His intellect caught the attention of Apocalypse. Apocalypse genetically mutated Essex transforming him into Mister Sinister. Through the years Sinister became one of the greatest geneticists to ever live, skilled cloning, creating life and manipulating mutant DNA. #NathanielEssex #MisterSinister #MrSinister #XMen #Marvel