[... Well it's weird that someone doesn't know what that is, but...]

Sure. An Endless is a being that's summoned from one world into another. I don't know if it's just those two worlds where it works...

[Anyway. That's off topic.]

Endless are also called dragons. We're worshiped as gods. The summoning is... pretty complicated, from what I hear... the Empire messed up mine and Deis'. But normally an Endless has a lot of power... enough to change the world as its summoners want.