Masticore is a rare Artifact Creature — Masticore card from World Championship Decks 2000 (WC00), collector number jk134. Current market price: $4.76, TCGplayer market prices via Scryfall.
At the beginning of your upkeep, sacrifice this creature unless you discard a card. {2}: This creature deals 1 damage to target creature. {2}: Regenerate this creature.