Fate/Blade

The 6th holy grail war is about to start. 7 mages from around the world are about to gather who will be followed by a Heroic Spirit. Then these mages and Spirits will fight side by side to the death until only one pair remains. The first 5 grail wars were inconclusive and now these 7 masters are determined to find a winner this time to reach the wish granting grail. The question is, who will win? Then once the grail is claimed and the winner realizes it's corrupted, will they give up their wish for the sake of protecting humanity from the destruction that any wish granted by it will bring?

This will be a story set in a fate universe where the 4th and 5th wars ended as normal wars so no one knows of the corruption yet. For those who know Achille's noble phantasm of invincibility everywhere except the heel, I'm changing it to measuring by rank instead of divinity so people can actually fight him, and the time lost if hit on the heel will be changed to the remainder of a battle.