Encantamiento
Siempre que una criatura vaya a un cementerio desde el juego, si tenía un contador -1/-1 sobre ella, pon un contador -1/-1 sobre la criatura objetivo.
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.