Smothering Abomination

Mana cost: {2}{B}{B}
Type: Creature — Eldrazi
Power / toughness: 4 / 3
Set: Battle for Zendikar Promos #99s (rare)

Devoid (This card has no color.)
Flying
At the beginning of your upkeep, sacrifice a creature.
Whenever you sacrifice a creature, draw a card.

Smothering Abomination has 3 printings, first in Battle for Zendikar (2015). EDHREC ranks it #3,889 among Commander cards. It appears most in Azlask, the Swelling Scourge decks (4,846 on EDHREC). 1 public deck on TCG runs it. It has 8 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: legal
pioneer: legal
standard: not legal
brawl: not legal

Public decks that run Smothering Abomination

Witherbloom Pestilence - Secrets of Strixhaven, led by Dina, Essence Brewer

Commanders that run Smothering Abomination most

Deck counts from EDHREC.

Azlask, the Swelling Scourge: 4,846 decks
Dina, Essence Brewer: 4,473 decks
Prossh, Skyraider of Kher: 1,908 decks
Endrek Sahr, Master Breeder: 1,629 decks
Shirei, Shizo's Caretaker: 1,361 decks
Mazirek, Kraul Death Priest: 985 decks
Extus, Oriq Overlord // Awaken the Blood Avatar: 916 decks
Gorma, the Gullet: 865 decks

Often played with Smothering Abomination

Cards that show up in the same decks on EDHREC.

Rulings

2015-08-25: Sacrificing Smothering Abomination will cause its last ability to trigger.
2015-08-25: If Smothering Abomination is the only creature you control as its first triggered ability resolves, you must sacrifice it.
2015-08-25: 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.
2015-08-25: A card with devoid is just colorless. It's not colorless and the colors of mana in its mana cost.
2015-08-25: Cards with devoid use frames that are variations of the transparent frame traditionally used for Eldrazi. The top part of the card features some color over a background based on the texture of the hedrons that once imprisoned the Eldrazi. This coloration is intended to aid deckbuilding and game play.
2015-08-25: You choose which creature you control to sacrifice as the first triggered ability resolves. Players can respond to this ability triggering, but once you choose a creature to sacrifice, it's too late for anyone to respond.
2015-08-25: Other cards and abilities can give a card with devoid color. If that happens, it's just the new color, not that color and colorless.
2015-08-25: Devoid works in all zones, not just on the battlefield.