Terrence looked at her expectant face and wished he could say, Yes, I, the mighty wizard, can break this spell! Unfortunately, he'd hadn't the faintest idea of where to start. Deflating and ego crushing to say the least. Of course, he wouldn't admit defeat quite yet, he was a man after all. He walked back and forth over the invisible line enough times to wear a track in the ground, but inspiration didn't strike him.
This just doesn't make sense. How can magic be hiding the location of the box when there is no magic to be felt? About to confess his bafflement, his eye caught the glint of sunlight off a piece of metal.
The key. An important little clue he'd forgotten all about.
Hold on a second, hadn't he read something about the key in the book. Another stupid rhyme that had made no sense at the time, but now ...