APOCALYPSE

Five thousand years ago, a mutant warlord named En Sabah Nur was already ancient — and still hungry for more. Guided by the immortal Garbha-Hsien, he found a titanic vessel buried in Mongolia: a ship left behind by the Celestials, the godlike beings who had engineered humanity itself. Nur killed his guide, entered the ship — and emerged transformed. He came out calling himself Apocalypse, armed with plundered Celestial technology and a philosophy to match: survival of the fittest, enforced by a god.

The ship — its Celestial-built artificial intelligence and all — became Apocalypse's mobile headquarters for millennia. He enslaved its evolving AI, told it he had created it, and used its technology to reshape himself and others — most famously transforming the broken Angel into the Horseman Death. Celestial tech is the quiet engine behind Apocalypse's immortality, his shapeshifting, and his endless reinventions: the mutant was already formidable; the ship made him eternal.

And then the ship outlived its thief. After X-Factor defeated Apocalypse in battle, the damaged vessel crashed into the river — conveniently demolishing only X-Factor's own headquarters. The team moved in: the sentient ship, projecting a force field that barred non-mutants, became X-Factor's headquarters, later transforming into a building with a giant X and eventually taking humanoid form as Prosh. The weapon of a would-be god became the X-Men's living room.