With his success he found that the powers he inherited from the alien orb were ephemeral. After exerting too much energy, he needed to rest so the energy could regroup and refill. So, he had a rejuvenation chamber erected. The construction was that of a pyramid with ancient Egyptian architecture. Every hundred years it would be necessary to return to this chamber and allow for his powers to recharge, like that of a battery.
Apocalypse remains one of the greatest threats to the world and known universe.
Only fate and time will decide.