"Hey it's like they say, sufficiently advanced technology is indeterminable from magic, or something like that."

He snickered some, then walked them back outside, to where his wares were spread out over the ground. Tracing the perimeter of the blanket, he looked down at them in thought.

"There's a couple of different ways, but the main method is that the demon donating the magic gives up a portion of it to be copied into a vessel, which charges the charm and enchants it for the recipient. Such methods are usually pretty rare, but I think I've got something here..."