Ouroboroid
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.
- CMC
- 4
- Mana cost
- Color identity
- G
- Rarity
- mythic
- Set
- Edge of Eternities Promos
- Price
- $38.55
- EDHREC rank
- #2071
Ouroboroid enters the battlefield as a copy of any creature you control and accumulates +1/+1 counters whenever it deals combat damage — a persistent threat that compounds every time it connects. The comparison to Sage of Hours is inevitable in counter-stacking shells, but Ouroboroid's self-growing body is the headline, and Baru, Wurmspeaker decks that churn out enormous Wurms find it uniquely absurd.
Best Commanders
Commanders with the highest synergy
Baru, Wurmspeaker
Baru, Wurmspeaker generates massive Wurm tokens, and Ouroboroid can enter as a copy of one, then snowball into something even larger through repeated attacks — the synergy rate above 50% reflects how naturally it fits the go-wide-and-stomp gameplan.
Dyadrine, Synthesis Amalgam
Dyadrine, Synthesis Amalgam cares about creatures sharing types, and Ouroboroid's copy effect means it inherits the creature types of whatever it enters as — slotting Ouroboroid into a Dyadrine shell is often free value across multiple tribal synergies at once.
Bristly Bill, Spine Sower
Bristly Bill, Spine Sower proliferates +1/+1 counters and Ouroboroid arrives ready to receive them, growing exponentially faster than a creature that starts at base stats — the combination turns even a single combat step into a credible clock.
Kirri, Talented Sprout
Kirri, Talented Sprout rewards playing multiple spells and going wide with counters, and Ouroboroid's combat-damage trigger stacks additional counters on top of whatever Kirri is already distributing — the two together accelerate faster than either does alone.
Jenova, Ancient Calamity
Jenova, Ancient Calamity copies creatures and manipulates the battlefield at scale, and Ouroboroid's enter-as-a-copy ability stacks neatly with Jenova's own duplication lines — running both means your board state multiplies in a way opponents struggle to sequence removal around.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | legal |
| standard | legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Ouroboroid is legal across every major constructed format, but the honest truth is that Commander is where it lives. In Commander, the singleton rule and the emphasis on long, multi-player games give Ouroboroid the time it needs to copy a relevant creature, connect multiple times, and become the biggest thing on the board. In competitive Legacy or Modern, a five-mana creature that needs combat damage to grow is simply too slow against decks operating at spell-speed efficiency — you'll rarely untap with it. Pioneer and Standard are the same story: the format's premier threats either kill before Ouroboroid is relevant or answer it cleanly with cheap interaction. Ouroboroid is a Commander card first, and building around it in any other format requires a niche shell that the format's power level doesn't reward.
Key Combos
Combo lines featuring this card
OuroboroidCrystalline CrawlerAggravated Assault
Infinite colored mana; Infinite combat phases; Infinite untap of creatures you control; Infinite mana creatures you control can produce; Infinite +1/+1 counters on creatures you control
View on Commander Spellbook ↗Budget Alternatives
Cheaper options that do most of the same work
If $38.55 is too steep, Progenitor Mimic does a version of the copy-and-multiply role at a lower price point, though it creates token copies rather than becoming a single growing threat — the ceiling is different but the flavor is similar. For pure counter-stacking without the copy element, Kalonian Hydra is well under $10 and doubles counters on attack, which approximates Ouroboroid's compounding combat-damage trigger in the decks that care most about it.
Price Context
Current price
$38.55 premium tier
At $38.55, Ouroboroid sits firmly in the premium tier — comparable to other marquee creatures that anchor specific archetypes rather than slot into everything. It's a recent card with strong Commander demand, and that price reflects genuine play volume rather than speculation, so it's unlikely to crater unless a reprint arrives.
Explore
Sources
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.