X-Treme X-Men
An alternate of Earth-616's Professor X, there was seemingly little to distinguish Charles Xavier until the day he was was kidnapped by the forces of the Savior (unbeknownst to him, an alternate of himself), who removed his head from his body, placed in a life-giving "jar", and placed it with the heads of all the other alternate Xaviers put through the same procedure and made to scan the multiverse for the next mutants to be kidnapped. When the Savior was defeated, the collective of Xavier heads put themselves to work finding a new home for the people of the world they had been kidnapped to. However, in the process, all of the heads exploded, except one. This Xavier head would later aide a cross-dimension X-Men team in defeating ten evil Xaviers who are scattered throughout the multiverse and threaten existence itself.
Read more about this topic: Alternative Versions Of Professor X