Moonshadow is a mythic Creature — Elemental card from Lorwyn Eclipsed (ECL), collector number 313. Current market price: $19.44 (foil $24.19), TCGplayer market prices via Scryfall.
Menace This creature enters with six -1/-1 counters on it. Whenever one or more permanent cards are put into your graveyard from anywhere while this creature has a -1/-1 counter on it, remove a -1/-1 counter from this creature.