Thought-Knot Seer

({C} represents colorless mana.)
When this creature enters, target opponent reveals their hand. You choose a nonland card from it and exile that card.
When this creature leaves the battlefield, target opponent draws a card.

Tar Snare

Target creature gets -3/-2 until end of turn.

Untamed Hunger

Enchant creature
Enchanted creature gets +2/+1 and has menace. (It can't be blocked except by two or more creatures.)

Vampire Envoy

Flying
Whenever this creature becomes tapped, you gain 1 life.

Zulaport Chainmage

Cohort — {T}, Tap an untapped Ally you control: Target opponent loses 2 life.

Consuming Sinkhole

Devoid (This card has no color.)
Choose one —
• Exile target land creature.
• Consuming Sinkhole deals 4 damage to target player or planeswalker.

Eldrazi Aggressor

Devoid (This card has no color.)
This creature has haste as long as you control another colorless creature.

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

Immobilizer Eldrazi

Devoid (This card has no color.)
{2}{C}: Each creature with toughness greater than its power can't block this turn. ({C} represents colorless mana.)

Kozilek's Return

Devoid (This card has no color.)
Kozilek's Return deals 2 damage to each creature.
Whenever you cast an Eldrazi creature spell with mana value 7 or greater, you may exile this card from your graveyard. If you do, this card deals 5 damage to each creature.

Maw of Kozilek

Devoid (This card has no color.)
{C}: This creature gets +2/-2 until end of turn. ({C} represents colorless mana.)

Oath of the Gatewatch