Frederik Pohl wrote a novel about just such a creature. https://en.m.wikipedia.org/wiki/The_World_at_the_End_of_Time https://en.m.wikipedia.org/wiki/The_World_

Frederik Pohl wrote a novel about just such a creature. https://en.m.wikipedia.org/wiki/The_World_at_the_End_of_Time https://en.m.wikipedia.org/wiki/The_World_at_the_End_of_Time