Necroskitter is a rare Creature — Elemental card from Duel Decks: Mirrodin Pure vs. New Phyrexia (TD2), collector number 55.
Wither (This deals damage to creatures in the form of -1/-1 counters.) Whenever a creature an opponent controls with a -1/-1 counter on it dies, you may return that card to the battlefield under your control.
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