Blowfly Infestation
2 printings listed in our catalog, from newest to oldest.
Card text
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The 2 printings
All, with their prices ↓Official rulings
2 rulings · in English, source ScryfallWhen Blowfly Infestation's ability resolves, it will put a single -1/-1 counter on the targeted creature. It doesn't matter how many -1/-1 counters were on the creature that went to a graveyard as long as it had at least one on it.
2008-05-01 · Wizards of the CoastThis ability is mandatory. If you're the only player who controls any creatures when this ability triggers, you must target one of them.
2008-05-01 · Wizards of the CoastAll printings