Eldrazi Obligator

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

Oath of the Gatewatch

Devoid (This card has no color.)
When you cast Eldrazi Obligator, 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

Oath of the Gatewatch Promos

You may choose any creature as the target of Eldrazi Obligator’s triggered ability, including one that’s untapped or one you already control.