And that's the key element to his summoning here.

"Well then, that explains why you're here at all. If you were trying to save your world, then, of course you got picked to save this one. Or at least try. It's kind of a confusing mess. Not that it's bad, but it's not the easiest to explain right now. I saved my world back home... and lemme tell ya, it's TONS easier when you know exactly who your bad guy is, where they are, and you just have to go punch them in the face."