Oh, I have no idea at all why that might be.

[But he's smirking over his teacup, so at least he's not looking for a quarrel today.]

Mm. Rather, although I've yet to test it within the confines of this world. I can't use the same spell, but I have a similar one. If that doesn't work, either, well. It could mean my magic is simply being neutralized, and there could be no barrier at all.