 The Phoenix Force is composed of the psionic energy from all living beings' past, present, and future, and is an embodiment of rebirth and destructive transformation through "burning away what doesn't work", and helped to restart the universe before the Big Bang.The Marvel Universe is part of a Multiverse, with various universes coexisting simultaneously, "usually" without affecting each other directly.According to Reed Richards, the ultimate fate of the Multiverse is to perish in all-encompassing heat death.