History
After successfully corrupting several key members of the Quiet Council, Mr. Sinister and his accomplices on the council began to slowly spread their corruption to the rest of Krakoan society, with plans to eventually conquer the world.
Strange witnessed the Scarlet Witch being murdered, just in case her powers would ever be used against the Sinisters.[1] The Sinisters eventually succeeded in conquering the planet, and turned their attention to the interstellar empires which might oppose them. Strange made his way to Otherworld. By the year 77 after Sinister's plot began, Stephen was one of the Siegelords of Otherworld.
The Siegelords approached the Legion of the Night for an alliance, but were rejected, as the Legion knew that the Siegelords had no hope of survival. A year later, the Sinisters unleashed a triple Chimera, which undid Otherworld, killing Stephen in the process.[2]