结界
每当一个生物从场上置入坟墓场时,若其上有-1/-1指示物,则在目标生物上放置一个-1/-1指示物。
When 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.