
Thought-Knot Seer | Creature | Eldrazi | ({C} represents colorless mana.)
When Thought-Knot Seer enters the battlefield, target opponent reveals their hand. You choose a nonland card from it and exile that card.
When Thought-Knot Seer leaves the battlefield, target opponent draws a card. | Svetlin Velinov

Warden of Geometries | Creature | Eldrazi Drone | Vigilance
{T}: Add {C}. ({C} represents colorless mana.) | Jason Felix

Gravity Negator | Creature | Eldrazi Drone | Devoid (This card has no color.)
Flying
Whenever Gravity Negator attacks, you may pay {C}. If you do, another target creature gains flying until end of turn. ({C} represents colorless mana.) | Chase Stone

Thought Harvester | Creature | Eldrazi Drone | Devoid (This card has no color.)
Flying
Whenever you cast a colorless spell, target opponent exiles the top card of their library. | Winona Nelson

Havoc Sower | Creature | Eldrazi Drone | Devoid (This card has no color.)
{1}{C}: Havoc Sower gets +2/+1 until end of turn. ({C} represents colorless mana.) | Svetlin Velinov

Inverter of Truth | Creature | Eldrazi | Devoid (This card has no color.)
Flying
When Inverter of Truth enters the battlefield, exile all cards from your library face down, then shuffle all cards from your graveyard into your library. | Chase Stone

Oblivion Strike | Sorcery | | Devoid (This card has no color.)
Exile target creature. | Daniel Ljunggren

Sifter of Skulls | Creature | Eldrazi | Devoid (This card has no color.)
Whenever another nontoken creature you control dies, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}." ({C} represents colorless mana.) | Slawomir Maniak

Witness the End | Sorcery | | Devoid (This card has no color.)
Target opponent exiles two cards from their hand and loses 2 life. | Igor Kieryluk

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

Maw of Kozilek | Creature | Eldrazi Drone | Devoid (This card has no color.)
{C}: Maw of Kozilek gets +2/-2 until end of turn. ({C} represents colorless mana.) | Daarken