Cheapest priced copy (Commander Masters): $0.99 at Card Kingdom, near mint, their price list as of .
Oblivion Sower 
Creature — Eldrazi · 5/8 · Mythic · Commander Masters · #808
When you cast this spell, target opponent exiles the top four cards of their library, then you may put any number of land cards that player owns from exile onto the battlefield under your control.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
6 printings · $0.99 to $12.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Battle for Zendikar | 11 | Mythic | $1.29 | $4.49 |
| Commander Masters | 808 | Mythic | $0.99 | — |
| Duel Decks: Zendikar vs. Eldrazi | 41 | Mythic | — | $1.29 |
| Modern Horizons 3 Commander | 158 | Mythic | $0.99 | $2.49Out of stock |
| Outlaws of Thunder Junction Commander | 77 | Mythic | $0.99 | — |
| Battle for Zendikar Promos | 11s | Mythic | — | $12.99Out of stock |
2 rulings from Wizards of the Coast
- 25 August 2015Oblivion Sower's ability allows you to put any land cards the player owns from exile onto the battlefield, regardless of how those cards were exiled.
- 25 August 2015Cards that are face down in exile have no characteristics. Such cards can't be put onto the battlefield with Oblivion Sower's ability.