Fight Rigging is a rare Enchantment card from Final Fantasy Commander (FIC), collector number 303. Current market price: $0.27, TCGplayer market prices via Scryfall.
Hideaway 5 (When this enchantment enters, look at the top five cards of your library, exile one face down, then put the rest on the bottom in a random order.) At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. Then if you control a creature with power 7 or greater, you may play the exiled card without paying its mana cost.