The question gets really silly when you try to talk about things like the end of the universe. Look at the question of heat death for instance:
If you're immortal and retain the ability to act, the heat death can never occur since you yourself can generate entropy. But how do you get the energy to continually do this in an otherwise no-entropy universe?
So for the end of the universe to make any sense, all of the information that comprises you would necessarily be annihilated, in which case it makes no sense to speak of you as immortal since there is no sense whatsoever in which you exist.
If we assume that you DO have magical abilities to generate entropy, given infinite time there's no reason you couldn't play god and set a whole new universe in motion. If you wanted to, you could re-engineer humanity and do that whole dance over again.
If you're immortal and retain the ability to act, the heat death can never occur since you yourself can generate entropy. But how do you get the energy to continually do this in an otherwise no-entropy universe?
So for the end of the universe to make any sense, all of the information that comprises you would necessarily be annihilated, in which case it makes no sense to speak of you as immortal since there is no sense whatsoever in which you exist.
If we assume that you DO have magical abilities to generate entropy, given infinite time there's no reason you couldn't play god and set a whole new universe in motion. If you wanted to, you could re-engineer humanity and do that whole dance over again.