Cheapest priced copy (Commander Masters): $0.69 at Card Kingdom, near mint, their price list as of .
Matter Reshaper 
Creature — Eldrazi · 3/2 · Rare · Oath of the Gatewatch · #6
({C} represents colorless mana.)
When this creature dies, reveal the top card of your library. You may put that card onto the battlefield if it's a permanent card with mana value 3 or less. Otherwise, put that card into your hand.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.69 to $5.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Masters | 806 | Rare | $0.69 | — |
| Oath of the Gatewatch | 6 | Rare | $0.79 | $1.49 |
| Oath of the Gatewatch Promos | 6s | Rare | — | $3.49 |
| Secret Lair Drop | 1048 | Rare | $5.99 | $4.49 |
2 rulings from Wizards of the Coast
- 22 January 2016If you don’t put the card onto the battlefield for any reason, you put the card into your hand.
- 22 January 2016If you put an Aura card onto the battlefield this way, you choose what it enchants as it enters the battlefield. You must be able to choose a legal player or permanent or you can’t put the Aura onto the battlefield.