Phi, fee Officer

At the beginning of your end step put X
Nuh Uh counters on Phi,where X is
the amount of cards that were milled this turn.
Whenever an opponent casts a spell you may remove any amount of Nuh Uh counters from Phi to Counter that spell unless it‘s controller pays X mana where X is the amount of removed Nuh Uh counters.

Nuh Uh Motherfucker !