Dread pooled in his stomach. "Nineteen people," he whispered, "each of them responsible for powering their part with a sacrifice they don't understand and have no guidance for. It's a wonder the ritual worked at all."
Things suddenly clicked in his brain as seemingly unconnected facts bubbled up from the depths and a horrifying picture began to form in his mind's eye. "The Familiar Bonding ritual is one of the few legal rituals because if it goes wrong the wizard participating is safe; the ritual rebounds on the subject," he recited tonelessly. "Pain, flesh and blood are common sacrifices in the Darker Arts."
He closed his eyes. "Some of the sacrifices were insufficient but you willed the ritual to complete anyway. So it went for the only source of sacrifice available. Me. Not only did you rip me from my world, you used my pain and misery to pay for it!"
He could hear Tonks sputter, uttering doubts and platitudes but his gut told him his intuition was correct. How could it not be? He was Harry bloody Potter, the universe's chew toy. Being tapped as a literal source of misery should have been expected.
"All right, enough self-pity," he muttered before pinning Tonks down with a stare. "Congratulations, you've assuaged my worries that you're all monsters. Instead, you're absolute morons with the spectacular fortune of having me to bear the brunt of your stupidity."