unprophesied_of_ages

"I can get one. Capturing the sadistic villain with a sorcerer collection isn't going to be foiled for lack of a backpack."

He tells the other two fairies, "Go back through the gate, return to whatever you'd be doing normally, and do everything in your power to make sure nobody finds out where you've been or anything about me."

Then he opens the door the required way, disappears through it, and will return shortly.