Miles was the only person in the room who could not see magic; nonetheless, judging by Leo's extreme freakout, he knew something had gone terribly wrong.

(If he had seen the sacrifice, he would have been out of there faster than you could say No Thanks. He'd had it up to here with rituals and all of that crazy shit.)

"Whoa, whoa, whoa!" he said, jumping back. "Try not to scream in my ear, I need that!" He cleared his throat. "Valdis? Why am I the only one who hasn't touched anything, and, more importantly, what in the whole hell just happened?"