He is a villian that was not in any of the movies. His powers aren't physical and he wasn't a horseman of apocalypse. He is not part of the brotherhood, not an arch enemy of Wolverine. Still alive. Was in Uncanny X-Men like 3 years ago. He is not omega level. Not Sebastian Shaw, Apocalypse, or Sinister. Was in a group of sorts. Was a major villian. Not a marauder. He has only been in the comics (not in any of the cartoons). Not Stryfe or a robot. Never been an acolyte. And not Arcade or Xorn.
IT must be Shadow King http://en.wikipedia.org/wiki/Shadow_King
or
Karma http://www.marveldirectory.com/individuals/k/karma.htm
nightcrawler's real dad
http://en.wikipedia.org/wiki/Azazel_(X-Men)
i've got someone trapped in the danger room,
guess who