Wumpus Aberration
Creature — Eldrazi Beast
Devoid (This card has no color.)
When you cast this spell, if 
wasn't spent to cast it, target opponent may put a creature card from their hand onto the battlefield.
Trample
All who behold its twisted form are consumed by a single-minded obsession: destroy it.
Filip Burburan
Modern Horizons 3 (MH3)
• #176Rulings
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.
(wotc • 2024-06-07)
Devoid works in all zones, not just on the battlefield.
(wotc • 2024-06-07)
A card with devoid is just colorless. It's not colorless and the colors of mana in its mana cost.
(wotc • 2024-06-07)
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.
(wotc • 2024-06-07)
Wumpus Aberration's triggered ability will resolve before Wumpus Aberration does. If Wumpus Aberration is countered or otherwise leaves the stack in response to that triggered ability, the triggered ability will still resolve as normal.
(wotc • 2024-06-07)
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.
(wotc • 2024-06-07)
Rulings
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.
(wotc • 2024-06-07)
Devoid works in all zones, not just on the battlefield.
(wotc • 2024-06-07)
A card with devoid is just colorless. It's not colorless and the colors of mana in its mana cost.
(wotc • 2024-06-07)
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.
(wotc • 2024-06-07)
Wumpus Aberration's triggered ability will resolve before Wumpus Aberration does. If Wumpus Aberration is countered or otherwise leaves the stack in response to that triggered ability, the triggered ability will still resolve as normal.
(wotc • 2024-06-07)
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.
(wotc • 2024-06-07)