Cheapest priced copy (Duels of the Planeswalkers 2010 Promos): $4.99 at Card Kingdom, foil, near mint, their price list as of .
Nissa Revane 
Legendary Planeswalker — Nissa · Mythic · Zendikar · #170
+1: Search your library for a card named Nissa's Chosen, put it onto the battlefield, then shuffle.
+1: You gain 2 life for each Elf you control.
−7: Search your library for any number of Elf creature cards, put them onto the battlefield, then shuffle.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $4.99 to $14.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duels of the Planeswalkers 2010 Promos | 2 | Mythic | — | $4.99 |
| The List | ZEN-170 | Mythic | $7.99 | — |
| Zendikar | 170 | Mythic | $5.49 | $14.99 |
2 rulings from Wizards of the Coast
- 1 October 2009You may activate Nissa’s first ability even if you know you have no cards named Nissa’s Chosen in your library. You must still shuffle your library in that situation.
- 1 October 2009You may activate Nissa’s second ability even if you control no Elves.