Omnath, Locus of the Roil

Mana cost: {1}{G}{U}{R}
Type: Legendary Creature — Elemental
Power / toughness: 3 / 3
Set: Lorwyn Eclipsed Commander #130 (mythic)
Price: $0.39 USD

When Omnath enters, it deals damage to any target equal to the number of Elementals you control.
Landfall — Whenever a land you control enters, put a +1/+1 counter on target Elemental you control. If you control eight or more lands, draw a card.

Omnath, Locus of the Roil has 4 printings, first in Core Set 2020 (2019). EDHREC ranks it #3,554 among Commander cards. It appears most in Ashling, the Limitless decks (19,141 on EDHREC). 1 public deck on TCG runs it. It has 3 official rulings.

Legality

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

Public decks that run Omnath, Locus of the Roil

Dance of the Elements - Lorwyn Eclipsed Commander Deck, led by Ashling, the Limitless

Commanders that run Omnath, Locus of the Roil most

Deck counts from EDHREC.

Often played with Omnath, Locus of the Roil

Cards that show up in the same decks on EDHREC.

Rulings

2019-07-12: If the target Elemental is an illegal target by the time Omnath's second ability tries to resolve, the ability doesn't resolve. You don't draw a card if you control eight or more lands. If the target is legal but can't have a +1/+1 counter put on it (most likely because an opponent controls Blightbeetle), you do draw a card if you control eight or more lands.
2019-07-12: You may choose Omnath as the target of its own second ability.
2019-07-12: The number of Elementals you control is counted as Omnath's first ability resolves. If Omnath is still on the battlefield, it will count itself.