Charles Xavier
The rest of the team then ally themselves with Black Air, Albion, and Lionheart. They then tried to take control of Lionheart during a mission to free Dark Professor X. However, as Dark Professor X tried to take control Lionheart revealed Albion knew of their treachery and placed a device to stop his mind control and then placed a collar on Dark Professor Xavier to trap the Shadow King in Professor X and killed them both.