Cheapest priced copy (Coldsnap): $0.35 at Card Kingdom, near mint, their price list as of .
Martyr of Spores 
Creature — Human Shaman · 1/1 · Common · Coldsnap · #113
{1}, Reveal X green cards from your hand, Sacrifice this creature: Target creature gets +X/+X until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Coldsnap | 113 | Common | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 15 July 2006A card that’s already revealed for another cost or because of an effect can be revealed to pay this cost.
- 15 July 2006Each card that’s revealed to pay the cost remains revealed until the ability leaves the stack.
- 15 July 2006If one of the cards that’s revealed to pay the cost leaves its owner’s hand before the ability resolves, it stops being revealed, but the value of X is not affected.