Fate Ga Kill

All it takes is a single spark to ignite a raging inferno and burn away the darkness that plagues the world. That was a fact, the last master of Chaldea learned and after finishing the Sixth Singularity, he understood where the Lion King messed up. Now, in order to save himself, he must save this dark and twisted world form it's own darkness, with the help of a lovely Assassin.