Potency

“Shiki told me the cut was around the area of the left ventricle and
the aorta, so it might have been the mitral valve. Is it all right?” She says
such an absurd thing so normally. The peculiarity of her manner of speech
catches me off guard, and I smile despite myself.
“You’re a strange one, aren’t you? If my heart had really been cut, then
we wouldn’t be able to talk like this, would we?”

“Quite right. I was only confirming.” I see. She was a friend of the person
who stabbed me after all, perhaps trying to tie up loose ends on the battle
that took place in the rooftop. “But it won’t be long until it affects you as
well. Shiki’s Eyes are potent, perhaps even beyond what that child knows.
The sympathetic connection between your double existences means that
the spell will reach you in time. There are a few inquiries I need to make,
which is why I’m here.” She means the “other” me when she mentions the
double existence, I’d imagine.

Part 1, Page 30