Kozilek's Unsealing #65
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Card Details
Devoid
Whenever you cast a creature spell with mana value 4, 5, or 6, create two 0/1 colorless Eldrazi Spawn creature tokens with "Sacrifice this token: Add 
."
Whenever you cast a creature spell with mana value 7 or greater, draw three cards.
Illustrated by Raph Lomotan
Rulings (7)
Jun 7, 2024
A card with devoid is just colorless. It's not colorless and the colors of mana in its mana cost.
Jun 7, 2024
Devoid doesn't affect the color identity of the card for the purposes of the Commander variant. For example, while Abstruse Appropriation is colorless because it has devoid, its color identity is still white and black, and it can't be included in a Commander deck where the commander's color identity doesn't include both white and black.
Jun 7, 2024
Devoid works in all zones, not just on the battlefield.
Jun 7, 2024
If a card loses devoid, it will still be colorless. This is because effects that change an object's color (like the one created by devoid) are considered before the object loses devoid.
Jun 7, 2024
If you cast a creature spell with 
in its mana cost, use the value of X that was chosen when it was cast to determine its mana value.
Jun 7, 2024
Kozilek's Unsealing's triggered abilities trigger before the spell that causes it to trigger. The ability will resolve even if that spell is countered or otherwise leaves the stack.
Jun 7, 2024
Other cards and abilities can give a card with devoid a color. If that happens, it's just the new color, not that color and colorless.