(But if he's an immortal being who can live in space, why would EB even want to kill his way to more control of property on Earth? This is like the implausible

(But if he's an immortal being who can live in space, why would EB even want to kill his way to more control of property on Earth? This is like the implausible plot of a bunch of alien invasion stories where societies capable of interstellar travel still want to come here to violently seize our dirt and water, for some reason.) Indeed. That's the consistently ridiculous theme that has pervaded SF for decades, Oblivion being a recently example that I've seen. If you've already uploaded, then you might want to just ship yourself off to another solar system, so that you can have unimpeded access to all that matter and energy, instead of competing for stuff here.