"I could research it," Adam said, not closing the door on it. "Ostara is a big holiday for my kind, there would be a lot of ambient power floating around. It's absolutely possible I could channel it with some kind of spell and switch you back but the rites aren't held until three days from now. Which is probably about as long as I would have to research a big spell like this. When you're dealing with magic on humans, it gets a lot more complex than making doors and summoning up waves."