il n'y a que toi qui

you're the only one who

→ il
phrase Rare #42,860
you're the only one who The verb after « qui » refers to « toi »; it may be in the subjunctive.
FR: Il n'y a que toi qui puisses m'aider.
EN: You're the only one who can help me.

Il n'y a que toi qui compte.

It's only you that matters.

Il n'y a que toi qui le sache.

Only you know.

— Divorce à l'italienne (1961)

Il n'y a que toi qui aies le droit de gagner, peut-être ?

Maybe you're the only one who's allowed to win?

— Shower (1999)

Il n'y a que toi qui as le droit de me coiffer.

You're the only one who's allowed to do my hair.

— Do the Right Thing (1989)

Il n'y a que toi qui sois comme ça.

You're the only one who's like that.

— La dolce vita (1960)

Il n'y a que toi qui comptes.

It's only you who matters.