The grail wasn't 'something that grants wishes' - instead, it was 'something containing all evils of the world.' My Servant and I — we had to team up with another Master to destroy it.
-Saber- Yeah...
...Who's your Master? I might have met them.
-Dot- Ah. Yeah, if you're used to them, then it'd be better to keep them.
UN JOUR JE SERAI DE RETOUR PRÈS DE TOIAh, really? I've met another person with Command Spells on their hand here, so I thought that was who your Master was.
-Max- Yeah. I guess you could say that if the other Masters were volunteers, I was a conscript. It was a complete accident that I ended up a Master.
-nods to Dot- Yeah, I was just curious. There's nothing like that where I'm from, except in movies and books.
-Gilgamesh is casually strollin' through town-
UN JOUR JE SERAI DE RETOUR PRÈS DE TOI

If there is, I don't know of it.