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Blowfly Infestation

Enchantment

Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature.

CMC
3
Mana cost
{2}{B}
Color identity
B
Rarity
uncommon
Set
Lorwyn Eclipsed Commander
Price
$0.41
EDHREC rank
#3259
Buy on TCGplayer
Blowfly Infestation card art
Blowfly Infestation turns every -1/-1 counter that kills a creature into a free counter placement on any target — an engine that loops indefinitely once you have enough bodies. The cost is real: three mana and an enchantment slot that does nothing without a steady stream of creatures dying to counters. Pair it with Nest of Scarabs or Auntie Ool, Cursewretch and the engine becomes a self-feeding kill condition; run it alone and it's just a slow removal rider.

Best Commanders

Commanders with the highest synergy

01
Auntie Ool, Cursewretch

Auntie Ool, Cursewretch

95.0% of decks · synergy 0.88

Auntie Ool, Cursewretch is the premier home for Blowfly Infestation — Auntie Ool spreads -1/-1 counters on entry, and Blowfly Infestation converts every resulting death trigger into another counter placement, creating a recursive loop that clears the board and generates value simultaneously.

02
The Scorpion God

The Scorpion God

88.8% of decks · synergy 0.88

The Scorpion God draws a card whenever a creature gets a -1/-1 counter, so Blowfly Infestation's chain of death-triggered placements turns a single kill into a full hand refill.

03
Hapatra, Vizier of Poisons

Hapatra, Vizier of Poisons

83.4% of decks · synergy 0.80

Hapatra, Vizier of Poisons creates a 1/1 Deathtouch Snake every time a creature receives a -1/-1 counter, so Blowfly Infestation's ping on each death produces a new body — which can then die to another counter and restart the loop.

04
The Reaper, King No More

The Reaper, King No More

86.1% of decks · synergy 0.79

The Reaper, King No More cares about creatures dying and counters accumulating, and Blowfly Infestation supplies a reliable death-and-placement chain that feeds both halves of that payoff engine.

05
Massacre Girl, Known Killer

Massacre Girl, Known Killer

72.9% of decks · synergy 0.71

Massacre Girl, Known Killer gives all your creatures wither, meaning combat damage already applies -1/-1 counters — Blowfly Infestation converts every combat kill into a free counter on the next blocker, turning ordinary attacks into cascading board wipes.

Format Analysis

Where it lives, where it can’t

FormatVerdict
commander legal
legacy legal
modern legal
pioneer not legal
standard not legal
vintage legal
pauper not legal
oathbreaker legal

Blowfly Infestation is a Commander card through and through — the loop payoff requires multiple creatures, multiple turns, and dedicated synergy pieces that only Commander deckbuilding can assemble at density. It's legal in Legacy, Vintage, and Modern, but sees essentially no play in any of those formats: three mana for a conditional trigger that requires a specific board state is too slow and too narrow against interactive 60-card fields. Oathbreaker is a plausible second home if the signature spell involves -1/-1 counters, but Commander remains the format where Blowfly Infestation actually functions as the engine it's designed to be.

Key Combos

Combo lines featuring this card

Price Context

Current price

$0.41 bulk tier

At $0.41, Blowfly Infestation is bulk — surprising for a card that's an engine piece in three high-popularity Commander decks. The low price reflects its narrow scope: it does almost nothing outside dedicated counter synergy shells, which caps demand and keeps it accessible for anyone building Hapatra or Auntie Ool on a budget.

Explore

Sources

Mentioned

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Updated . Data from Scryfall, EDHREC, and Commander Spellbook.