"Most bargain," he says vaguely. "One soul for one heart's desire, and so forth. But if someone's got a hold of something like a feather and knows how to use it - well, there are rules."

Foxes in foxholes, and rats down ratholes, they too are hurt.

Even for things like him, there are rules.

"So - yeah. It's not very pleasant. Plus the actual summoning always makes me lose my lunch."