Cheapest priced copy (Zendikar): $0.35 at Card Kingdom, near mint, their price list as of .
Oran-Rief Survivalist 
Creature — Human Warrior Ally · 1/1 · Common · Zendikar · #174
Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Zendikar | 174 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 1 October 2009This ability triggers on this creature entering, so it will enter with its unmodified power and toughness, and then receive a +1/+1 counter a short time later. It does not enter with the +1/+1 counter already on it.