"Oh yes, wouldn't want to be a man who can use seiĆ°r," Merlin said, with a slightly sarcastic tone. He set the book down on the table. "So. I would say try something subtle like holy water or kosher rock salt, see if there is any reaction, and then possibly break into his house and see what you can find anything that might give you a direction. In the mean time, I can do more research for other potential options, such as shape-shifters, but there are so many options that it would need narrowing down to know how to deal with it." He looked across at Freyja and straightened up. "How does that sound?"