"That's easy," Sotero says, and tilts both his hands, dropping the lump of molten rock towards the ground. It goes from blazing-red to dulling black almost at once, and hits the ground as a solid stone again, just a different shape.

Dusting his palms off, he looks up at Ebisu. "Part of it is just stopping heating it up, but part of it is taking the heat back in, too. That's why I can't do it with a whole volcano, especially 'cause I'm not the one heating it up."