He was mortally wounded in battle with Grotesk by the explosion of an oscillotron machine and , consequently , died preventing the destruction of Earth .
Changeling , masquerading as Professor X , led the X-Men's efforts to defeat the Subterranean Grotesk .
Professor X was mortally wounded in battle with Grotesk by the explosion of an oscillotron machine and , consequently , died preventing the destruction of Earth .
Changeling , masquerading as Professor X , led the X-Men's efforts to defeat the Subterranean Grotesk .