FOILCheapest priced copy (Oath of the Gatewatch): $0.49 at Card Kingdom, near mint, their price list as of .
Eldrazi Obligator 
Creature — Eldrazi · 3/1 · Rare · Oath of the Gatewatch Promos · #96s
Devoid (This card has no color.)
When you cast this spell, you may pay {1}{C}. If you do, gain control of target creature until end of turn, untap that creature, and it gains haste until end of turn. ({C} represents colorless mana.)
Haste
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.49 to $2.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Oath of the Gatewatch | 96 | Rare | $0.49 | $1.49 |
| Oath of the Gatewatch Promos | 96s | Rare | — | $2.79 |
One ruling from Wizards of the Coast
- 22 January 2016You may choose any creature as the target of Eldrazi Obligator’s triggered ability, including one that’s untapped or one you already control.