Renegade Bull is a rare Creature — Ox card from Secrets of Strixhaven Commander (SOC), collector number 84. Current market price: $0.24, TCGplayer market prices via Scryfall.
Trample Whenever you cast an instant or sorcery spell, this creature gets +X/+0 until end of turn, where X is that spell's mana value. Whenever this creature attacks, exile up to one target instant or sorcery card from your graveyard and copy it. You may cast the copy without paying its mana cost.