Cheapest priced copy (Modern Horizons 3): $0.79 at Card Kingdom, near mint, their price list as of .
Kozilek's Unsealing 
Enchantment · Uncommon · Modern Horizons 3 · #65
Devoid (This card has no color.)
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 {C}."
Whenever you cast a creature spell with mana value 7 or greater, draw three cards.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.79 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons 3 | 65 | Uncommon | $0.79 | $0.99 |
7 rulings from Wizards of the Coast
- 7 June 2024Devoid works in all zones, not just on the battlefield.
- 7 June 2024Other 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.
- 7 June 2024If 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.
- 7 June 2024Kozilek'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.
- 7 June 2024A card with devoid is just colorless. It's not colorless and the colors of mana in its mana cost.
- 7 June 2024Devoid 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.
- 7 June 2024If you cast a creature spell with {X} in its mana cost, use the value of X that was chosen when it was cast to determine its mana value.