The Greatest Holy Grail War

You’ve heard of the Holy Grail war and the Greater Holy Grail War. But what if you went one step further? Instead of seven, not fourteen, no twenty one servants in one fight for the wish granting device. Three groups fighting for there own wish, Black, Red and White. All super powerful in their own right. But who would be the most powerful? ======================================= Cross over includes: -One Piece -Destiny(the game) -Solo Levelling -Monster Pet Evolution -Tokyo Ghoul -Black Clover -Custom made Demon King And of course -Nasuverse The last one is a fan fic that I didn’t realise was a fan fic until I started writing this. Please enjoy, and this is already pre written, although not every chapter is, I only have six chapters and after that I have to make time to make more. I also have another fate fan fic I can release if you want.