Can grant air-walking to other people

We were standing in the middle of a vast desert, with an ancient city in the distance. By day this place would be too hot to survive, but right now it was just warm.

"I've granted you the ability to stand on air," I said. "There's nothing here to destroy, but I figure that you don't want to have the ground turn to glass around your ankles."

He took a ginger step onto the air, testing its firmness and then he nodded.

***

Molten