The Large Black Dog crouched beside them, utterly dumbstruck. He lifted a paw to look at his already healed wound, then stared at the wall lying shattered across the ground.
I'm that powerful? When Zhang asked earlier if he could use a little blood for an experiment, saying black dog blood dispelled evil magic, I didn't even believe him.
Lesson learned! Next time I run into dark magic, I'll draw some blood!
Zhang Xiao lowered the bowl in astonishment too. Was it really that effective?
I really only meant to try an experiment. Dad said black dog blood did work, and blood from a black dog who understood people and didn't have a single stray-colored hair worked even better.
He looked back at Sirius. The Large Black Dog was wearing an expression straight out of a classic meme from his previous life.
Yep. Understands people, no stray hairs. Top quality!
Thinking it through logically, the door was supposed to be opened with blood anyway. Perhaps black dog blood wasn't normally this potent, and the combination of the two had produced such a powerful effect.
Zhang Xiao pinched his chin and nodded repeatedly. That seemed like a reasonable theory.
But his gaze kept drifting toward Sirius. Hadn't research in his previous life shown that drawing blood once every six months wouldn't affect your health?
Taking that idea a little further... once we reach the stone basin on Lake Island, could pouring some boy's urine over it neutralize that strange potion?
"Oh? You noticed it too, Zhang?"
Dumbledore was genuinely curious. Even he had spent several minutes untangling what that whole series of spells was meant to do.
Blood was indeed the key to opening this door, but wasn't this effect... a little excessive?
"Professor, I actually didn't notice anything."
Zhang Xiao