Kirei, who's holding the position of initiative after completely reversing the situation of attack and defense, spoke and walked over leisurely. And once again a Black Key appeared in his hands. The long blade of the Black Key is a semi-solid formed by prana, so while carrying it just holding the small hilt is sufficient. Nobody knows exactly how many Black Keys are hidden under Kirei's loose frock.

- Fate/Zero: Act 5, Part 2