Just a story idea. If someone wants to use it, let me know.

Fate/Stay Night + Anime x-overs

The War of Kings

Set in Fate/Zero

It's the Fourth Holy Grail War, and every Servant is a King!

Saber, Archer, and Rider remain the same.

Caster, Lancer, Berserker, and Assassin must be Kings (or something similar/comparable)

Possible Servants:

Yugi Muto, Yu-Gi-Oh, Caster, King of Games

Monkey D. Luffy, One Piece, Berserker, King of Pirates

Naruto Uzumaki, Naruto, Assassin/Caster, Seventh Hokage

Natsu Dragneel, Fairy Tail, Caster/Berserker, King of Dragons (he beat Acnologia, the previous Dragon King)

Alucard, Hellsing Ultimate, Berserker/Caster, No-Life King

Rider's Feast of Kings should include all seven Kings

Hope someone finds this useful