The immortal walked. There was little else to do. Humanity had been gone for an eon. Many other species had vanished along with humans, and new ones arisen.
He had been bored for centuries. But then he saw an animal using a stone to crack a nut. Humans were far from alone in using tools, but this was the first one he had seen in centuries.
He followed the fuzzy thing. Perhaps he could teach them, encourage them to evolve intelligence. Perhaps, eventually, he could have a conversation with them. If nothing else, trying would give him something to do.
Author’s Note: Immortality could be extraordinarily dull, but an immortal could act as a light cast to the future to help provide later species a start on developing civilization.