The Demons in Grodot are immortal, but it’s limited. Once dead, they return to Geo, Grodot’s version of hell. It takes about a year for the demon to fully regrow, however, they can leave whenever they choose. Whenever they want to leave (regrown or not) they chant a phrase in their language, a sort of “password” if you will. Their essence then rapidly transfers to Grodot’s over world, a way of teleportation.

Didn’t feel like doing all the lighting or whatever

Also

It’s not finished, but Geo is just an open void of a meat like substance, where demons float at random areas, connected by a organic material that helps them regrow. When they start, their soul orb or whatever remained of their body when they died appears in an open slot, where the material is, immediately connecting. I might make it include pathways and stuff, with little huts built into the walls.