FOILCheapest priced copy (Battle for Zendikar): $0.99 at Card Kingdom, near mint, their price list as of .
Greenwarden of Murasa 
Creature — Elemental · 5/4 · Mythic · Battle for Zendikar Promos · #174s
When this creature enters, you may return target card from your graveyard to your hand.
When this creature dies, you may exile it. If you do, return target card from your graveyard to your hand.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.99 to $18.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Battle for Zendikar | 174 | Mythic | $0.99 | $3.49 |
| Lorwyn Eclipsed Commander | 110 | Mythic | $0.99 | — |
| New Capenna Commander | 294 | Mythic | $0.99 | — |
| Battle for Zendikar Promos | 174p | Mythic | $2.79 | $12.99 |
| Battle for Zendikar Promos | 174s | Mythic | — | $18.99 |
2 rulings from Wizards of the Coast
- 25 August 2015You decide whether to exile Greenwarden of Murasa as the last ability resolves. Players can respond to this ability triggering, but once it starts resolving and you decide to exile Greenwarden of Murasa, it's too late for anyone to respond.
- 25 August 2015If the target card becomes illegal before the last ability resolves, it won't resolve. You can't exile Greenwarden of Murasa in that case, even if you want to.