Obviously, there was a non-zero possibility that all of these were just a bluff to mislead Kiritsugu, and that Kirei would return to Fuyuki Church or Tohsaka residence. However, because of that, Kiritsugu had already set traps so that if Kirei set foot in any of the buildings, he would not be able to return alive. After being bombed to death, if the “vessel of the Holy Grail” was still unharmed, then victory would easily be his – as for Irisviel’s life, Kiritsugu had already looked philosophically upon it as a loss.

- Fate/Zero: Act 15, Part 2