Cheapest priced copy (Battle for Zendikar): $0.35 at Card Kingdom, near mint, their price list as of .
Oran-Rief Invoker 
Creature — Human Shaman · 2/2 · Common · Battle for Zendikar · #182
{8}: This creature gets +5/+5 and gains trample until end of turn.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Battle for Zendikar | 182 | Common | $0.35 | $0.49 |
| Duel Decks: Nissa vs. Ob Nixilis | 17 | Common | $0.35 | — |
| The List | DDR-17 | Common | $0.35 | — |