Kroxa, Titan of Death's Hunger is a mythic Legendary Creature — Elder Giant card from Secret Lair Drop (SLD), collector number 225. Current market price: $10.52 (foil $16.82), TCGplayer market prices via Scryfall.
When Kroxa enters, sacrifice it unless it escaped. Whenever Kroxa enters or attacks, each opponent discards a card, then each opponent who didn't discard a nonland card this way loses 3 life. Escape—{B}{B}{R}{R}, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)