The Holy Grail War. This omnipotent object is capable of granting one wish. However, when Yggdmillennia takes the Grail from the third war, the Association sends 7 magi to combat the 7 Yggdmillennia masters in a bloody deathmatch. Servants? Screw it, let's replace them! Let's see how these new Servants enter the fray...

This is just an idea I had. Might possibly continue it...