Will: Hmm, Will will probably not be eavesdropping. His canon implies that he's capable of reading minds, but that he doesn't do it. Because protecting human free will is a huge thing for him, and influencing minds is what his kind's enemy do. I usually play him as only receiving thoughts that are broadcast out. But if Penny get frustrated or something and broadcast out, he'd probably catch it.

Any particular kind of magic?

Oh, I should also mention that if Penny's type of telepathy can catch on things like the feeling of minds, then Will's mind would be obviously not human. If it had a feeling, it would be Light. Will's magic is described as the cold white flame at the center of the universe.

Danny: Sounds interesting! I'd love to play around with Danny's dream walking. Of course he has no idea what he's doing....

Conan: GOOD LUCK, PENNY.