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Card data and images from Scryfall. Card roles from the Scryfall Tagger project. Prices are estimates and may be out of date.

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Upgrade a deck My collection

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Marsh Gas | MTG Deck Rec

Marsh Gas

Marsh Gas

Instant

All creatures get -2/-0 until end of turn.

Legal in Commander
About $0.12

What it does

mass shrink

View on Scryfall

Art from Marsh Gas by Douglas Shuler

Cards that do the same job

In Marsh Gas's colors, best fit first. Paste your deck to see replacements picked for your commander.

Hell Swarm+$0.35

Commanders whose decks run it most

Marchesa, Dealer of DeathIn 2% of 58 decks

Prices are Scryfall estimates from Oct 19, 2026.

Deck counts come from decks shared publicly on Archidekt, counted only since the card came out.

Weakness−$0.06

Amulet of Safekeeping+$0.47

Boarded Window+$0.01

One-Eyed Scarecrow+$0.08

Bone Flute+$0.81

Public Execution−$0.02

Weakstone+$5.94

Wring Flesh−$0.08

Stronghold Overseer+$0.40

Cabal Trainee+$0.03