Tibalt's Trickery Final Fantasy put a knowledge counter on

put a knowledge counter on The Magic Mirror

" −12: Target opponent chooses a permanent they control and returns it to its owner's hand

look at the top seven cards of your library

you may pay {1}{G} if this permanent is attached to a creature you control

Whenever another nontoken creature you control enters

Tibalt's Trickery Final Fantasy put a knowledge counter onCounter target spell. Choose 1, 2, or 3 at random. Its controller mills that many cards, then exiles cards from the top of their library until they exile a nonland card with a different name than that spell. They may cast that card without paying its mana cost. Then they put the exiled cards on the bottom of their library in a random order.