The X-Men have met a number of different realities across the universe, but one of the most famous was the Age of Apocalypse reality, which transformed the Marvel Universe in the 1990s and introduced readers to Nate Grey, the mutant known as X-Man. Nate Grey's powers make him a living deity, having been genetically designed to be the most powerful mutant ever. In the Age of Apocalypse reality, he is the son of Scott Summers, commonly known as Cyclops, and Jean Grey. His powers are so immense that he can quickly create or destroy whole universes, and he is far more powerful than his more well-known alternative form, Cable.