殴りハエの蔓延 {2}{B}

Enchantment

クリーチャー１体が死亡するたび、そのクリーチャーの上に－１/－１カウンターがあった場合、クリーチャー１体を対象とする。その対象としたクリーチャーの上に－１/－１カウンター１個を置く。

殴りハエは死骸にしか涌かないものだが、なければ自力でこさえるのも吝かではない。

Illustrated by Caio Monteiro

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Only the English version of a Magic card receives Oracle updates and errata. View this card in English. (Scryfall note)
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. (2008-05-01)

This 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)