Ox of Agonas is a mythic Creature — Ox card from Theros Beyond Death (THB), collector number 318. Current market price: $4.25 (foil $14.98), TCGplayer market prices via Scryfall.
When this creature enters, discard your hand, then draw three cards. Escape—{R}{R}, Exile eight other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.) This creature escapes with a +1/+1 counter on it.