Worlds. Worlds plural. The Three Worlds is, technically, only one, and Stone knows it, they just call it three for the three places intelligent species live: earth, sea, and sky. This is something entirely different.

He rubs the palm of one hand at his temple with a low growl, deep in his throat, because being confused makes him irritated. "And this is not your world, either. Where are you from?"

Probably not the Three Worlds. He smells all wrong.