Well, I'm quite scientific so I like to understand things, even if they're created.
But as I understand it Pure energy was created, it never existed naturally, so understanding this it is a non-renewable energy source/fuel.
So, if your character dies in an area that was no Pure energy in the vicinity then technically youve nothing to connect to, like an Ethernet cable and no port to put it in.
Or if the energy runs out ten your character will become mortal again.