Crashing Centaur is a uncommon Creature — Centaur card from Odyssey (ODY), collector number 235. Current market price: $0.14 (foil $0.58), TCGplayer market prices via Scryfall.
{G}, Discard a card: This creature gains trample until end of turn. Threshold — As long as there are seven or more cards in your graveyard, this creature gets +2/+2 and has shroud. (It can't be the target of spells or abilities.)