Fate
>The man has swallowed black corruption. His heart is black and it seems like he's surrounded by an unknown darkness. The black corruption reaches in from the outside world, and it's like a chain binding the man. Kotomine Kirei was just like me. His body had some kind of fatal wound, and he is compensating for it with that unknown "something".
Heaven's Feel
>I don't ask him how he's alive. He's dying. I don't feel magical energy from his body. There's a black stain where his heart should be. Like me, a brief fire that's like a turned hourglass. I don't hear his heartbeat. He doesn't have much longer to live. This is not speculation, but a predication. Kotomine Kirei will die in a few minutes, even if he doesn't do anything.
Holy kino