Crater Hellion is a rare Creature — Hellion Beast card from Duel Decks: Heroes vs. Monsters (DDL), collector number 56. Current market price: $0.12, TCGplayer market prices via Scryfall.
Echo {4}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters, it deals 4 damage to each other creature.