Masticore is a rare Artifact Creature — Masticore card from World Championship Decks 1999 (WC99), collector number kb143b. Current market price: $7.17, 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.