In the parallel universe created by the death of Charles Xavier, Geoff was created by Nathaniel Essex, or Mr. Sinister as he's better know, from the genetic material of Scott Summers and Jean Grey. He is an immensly powerful telepath and telekinetic, designed to destroy Apocalypse, but is unfortuantly floored so that each use of his powers brings him closer to death. When the Age of Apocalypse was brought to a close Geoff arrived on our earth due to carrying a fragment of the M'Kran crystal, since his arrival Geoff has been trying to find a place to fit in. The society provided the perfect home for a genetically engineered mutant from another reality.