During the 19th Century, Nathaniel Essex encountered Apocalypse who used his technology to transform Essex into “Sinister”, the last word his dying wife ever spoke to him.
Soon after, a time displaced Gambit and Courier approached Sinister for help. Sinister agreed to help them, as long as he could have a DNA sample from Courier. This DNA sample allowed Sinister to replicate Courier shape shifting abilities, within Sinister’s own body.
Location
This villain is encountered during Chapter 7.