Cheapest priced copy (Coldsnap): $0.35 at Card Kingdom, near mint, their price list as of .
Martyr of Frost 
Creature — Human Wizard · 1/1 · Common · Salvat 2005 · #H5
{2}, Reveal X blue cards from your hand, Sacrifice this creature: Counter target spell unless its controller pays {X}.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
5 printings · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Coldsnap | 40 | Common | $0.35 | $1.99 |
| Duel Decks: Jace vs. Chandra | 2 | Common | $0.35 | — |
| Duel Decks Anthology: Jace vs. Chandra | 2 | Common | $0.35 | — |
| Salvat 2005 | H5 | Common | — | — |
| Salvat 2005 | H17 | Common | — | — |
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.