Made in Heaven.
It possessed the ability to accelerate time infinitely for everything except living creatures. Only its user and Made in Heaven itself could move normally within accelerated time.
By accelerating gravity across the entire Earth and universe, excluding its user, it could accelerate time infinitely and even make the universe undergo another iteration. Under infinite acceleration, one universe would reach a new universe.
Because of their experiences in the previous world, everyone would know their future in advance, right up until their death. Crucially, although everyone knew their fate, and the details might differ, that fate could not be changed.
Or, to put it another way, what had happened would happen again, and what had been done would be done again.
Father Pucci believed that knowing your fate in advance, preparing yourself, and accepting it meant you would not feel fear or despair when the moment truly arrived, because you were already prepared. Those who were prepared would always be happy. Even if they knew they would die tomorrow, they could still be happy as long as they were prepared.
Roland, however, did not share that view. Father Pucci disregarded human nature. The heaven he created erased humanity's chance to overcome fate, all because of his fear of the unpredictable encounters between people.
As Roland put it, none of his siblings had gotten into incest, so he had no such psychological baggage. Besides, a fixed fate for everyone, without any variation, would be boring. Thus, Roland intended to stop accelerating time once he had sent all the Lex Luthors home, rather than taking the world through a complete cycle.
"Time is accelerating even faster than before," Batman said, looking up at the sky. The moving clouds had become ghostly blurs, and sunrise and sunset had grown indistinct. "But