Cheapest priced copy (Innistrad): $0.35 at Card Kingdom, near mint, their price list as of .
Maw of the Mire 
Sorcery · Common · Innistrad · #108
Destroy target land. You gain 4 life.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Innistrad | 108 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 22 September 2011If the targeted land is an illegal target by the time Maw of the Mire resolves, it won’t resolve and none of its effects will occur. You won’t gain 4 life.