Agonasaur Rex
Creature — Dinosaur
Trample
Cycling 
(, Discard this card: Draw a card.)
When you cycle this card, put two +1/+1 counters on up to one target creature or Vehicle. It gains trample and indestructible until end of turn.
- CMC
- 5
- Mana cost
- Color identity
- G
- Rarity
- rare
- Set
- Aetherdrift Promos
- Price
- —
- EDHREC rank
- #4864
Agonasaur Rex hits the board and immediately starts distributing +1/+1 counters on attack, turning every combat step into a power-scaling event — the cost is steep, but Evolution Witness and similar recursion loops make that irrelevant once the engine is running. Venom, Deadly Devourer decks in particular treat it as a cornerstone, not a finisher.
Best Commanders
Commanders with the highest synergy
Venom, Deadly Devourer
Venom, Deadly Devourer's poison and counter synergies line up directly with what Agonasaur Rex does every attack step, which is why nearly 70% of Venom builds run it — the Rex accelerates the board-state faster than almost any other creature in the slot.
Ellie and Alan, Paleontologists
Ellie and Alan, Paleontologists care about Dinosaurs by name, and Agonasaur Rex is one of the premier payoffs in the tribe — the counter distribution compounds with whatever Ellie and Alan are already doing to grow the board.
Redshift, Rocketeer Chief
Redshift, Rocketeer Chief rewards aggressive, attacking creatures, and Agonasaur Rex delivers counter accumulation every time it swings — the synergy is straightforward but consistent enough that over a quarter of Redshift decks include it.
Ghalta, Primal Hunger
Ghalta, Primal Hunger wants the biggest creatures on the table, and Agonasaur Rex gets there fast — the Rex's self-scaling means Ghalta's cost reduction kicks in ahead of schedule.
Eshki, Temur's Roar
Eshki, Temur's Roar runs large green creatures and wants combat pressure, so Agonasaur Rex slots in as a threat that only gets harder to race the longer it survives.
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 |
Commander is where Agonasaur Rex is built to live — multiplayer combat means more attack triggers, more counters distributed, and more time for the Rex to compound into a genuine problem. In competitive 60-card formats like Modern and Pioneer, a high mana cost on a creature with no immediate enters-the-battlefield effect is a liability, and Agonasaur Rex doesn't see meaningful play there. Legacy and Vintage have enough broken things happening that a seven-drop Dinosaur doesn't register. Standard is the one constructed format where it could see fringe play as a top-end finisher in a Dinosaur shell, but the bar for that kind of card is high.
Key Combos
Combo lines featuring this card
Evolution WitnessAgonasaur RexKheru GoldkeeperBone MiserAshnod's Altar
Infinite card draw; Infinite draw triggers; Infinite self-discard triggers; Near-infinite +1/+1 counters on a creature; Near-infinite ETB; Near-infinite LTB; Near-infinite death triggers; Near-infinite sacrifice triggers
View on Commander Spellbook ↗Price Context
Current price
unknown tier
Pricing data for Agonasaur Rex isn't currently available through our sources, so check Scryfall or TCGPlayer for the current market rate before buying. Given the card's strong inclusion numbers in Venom, Deadly Devourer and Ellie and Alan, Paleontologists decks, demand is real — don't assume it's bulk without verifying.
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Sources
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.