Cheapest priced copy (Fourth Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Marsh Gas 
Instant · Common · Fourth Edition · #146
All creatures get -2/-0 until end of turn.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
4 printings · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fourth Edition Foreign Black Border | 146 | Common | — | — |
| Fourth Edition | 146 | Common | $0.35 | — |
| The Dark | 48 | Common | $0.35 | — |
| Renaissance | 59 | Common | — | — |