Is Ouroboroid legal in Standard, Modern, and Commander?

Ouroboroid is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Ouroboroid

Q: What type of card is Ouroboroid?

Ouroboroid is a Creature — Plant Wurm. Its oracle text reads: "At the beginning of combat on your turn, put X +1/+1 counters on each creature you control, where X is this creature's power. *"I've found a strange vine in the ice. Thawing for further analysis." —Meltstrider log, final entry* Power/Toughness: 1/3"

Creature — Plant Wurm

At the beginning of combat on your turn, put X +1/+1 counters on each creature you control, where X is this creature's power.

*"I've found a strange vine in the ice. Thawing for further analysis."

—Meltstrider log, final entry*

Power/Toughness: 1/3

Set Edge of Eternities

Rarity Mythic Rare

Mana Value 4

Artist Samuel Perin

Collector # 201

Scryfall

Standard	Legal
Pioneer	Legal
Modern	Legal
Legacy	Legal
Vintage	Legal
Commander	Legal
Pauper	Not legal
Historic	Legal

Why Play Ouroboroid

At four mana for what starts as a 1/1, the real value comes from its explosive scaling potential in creature-heavy strategies. Green midrange and token decks can leverage this to create overwhelming board states, as each combat step distributes counters based on Ouroboroid's current power across your entire army. The trigger happens at the beginning of combat, meaning you can grow Ouroboroid through other means before it distributes counters, creating exponential growth patterns that can close games quickly.

Format Notes

Commander represents this card's strongest format, where longer games and multiplayer dynamics allow time to build meaningful board states before the explosive turns begin. The $39.56 price tag reflects strong demand from EDH players building around +1/+1 counter themes and go-wide strategies. While legal across all major formats, the four-mana investment for a vulnerable 1/1 makes it less viable in faster competitive formats like Modern or Pioneer.

Combos & Synergies

Doubling Season creates immediate explosive potential by doubling both the counters Ouroboroid receives and distributes each turn. Rishkar, Peema Renegade turns your growing army into a massive mana engine, while Overwhelming Stampede can convert your counter-laden board into lethal damage. Token generators like Avenger of Zendikar provide the creature count needed to maximize the distributed counters while benefiting from the exponential growth.