Spinerock Tyrant is a mythic Creature — Dragon card from Lorwyn Eclipsed (ECL), collector number 322. Current market price: $1.68 (foil $3.46), TCGplayer market prices via Scryfall.
Flying Wither (This deals damage to creatures in the form of -1/-1 counters.) Whenever you cast an instant or sorcery spell with a single target, you may copy it. If you do, those spells gain wither. You may choose new targets for the copy.