Reach Out and Touch

Cal's been working on an elaborate spell to open a portal between universes and, after weeks of work and calculations to draft out the diagram and get all the symbols right and acquire all the right powders and pigments, he's eager to actually try it. Master Aubrey wants him to wait, but Cal has a day off today, and he doesn't see why the fact that it's Halloween should make any difference. He takes advantage of Aubrey's absence to go ahead on his own. After all, this is only practice, opening a portal to an empty, pocket universe. Even if something goes wrong, how bad could it be?