Cheapest priced copy (Rise of the Eldrazi): $0.99 at Card Kingdom, near mint, their price list as of .
Haze Frog 
Creature — Frog · 2/1 · Common · Rise of the Eldrazi · #187
Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, prevent all combat damage that other creatures would deal this turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.99 to $7.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Rise of the Eldrazi | 187 | Common | $0.99 | $7.99 |
2 rulings from Wizards of the Coast
- 15 June 2010If two Haze Frogs enter during the same turn, each one's ability will prevent the other one's combat damage.
- 15 June 2010Combat damage dealt by Haze Frog itself during the turn it enters isn't prevented. Combat damage that would be dealt by all other creatures is prevented, including creatures that weren't on the battlefield at the time the ability resolved.