Tyrranax Rex
Creature — Phyrexian Dinosaur
This spell can't be countered.
Trample, ward 
, haste
Toxic 4 (Players dealt combat damage by this creature also get four poison counters.)
- CMC
- 7
- Mana cost
- Color identity
- G
- Rarity
- mythic
- Set
- Phyrexia: All Will Be One
- Price
- —
- EDHREC rank
- #2923
Tyrranax Rex hits the board with ward 4, trample, haste, and toxic 4 — a five-keyword threat that demands an immediate answer and punishes any opponent who can't produce instant-speed interaction. Eight mana is real, but every word on this card earns its place, and Ixhel, Scion of Atraxa decks will cheat that cost down while stacking poison counters faster than opponents can stabilize.
Best Commanders
Commanders with the highest synergy
Ixhel, Scion of Atraxa
Ixhel, Scion of Atraxa is the natural home — proliferate synergies accelerate the poison counters Tyrranax Rex stacks with toxic 4, and Ixhel's corrupted payoffs make every hit count double.
Vishgraz, the Doomhive
Vishgraz, the Doomhive runs a poison-counter shell that wants large toxic threats to close games, and Tyrranax Rex's ward 4 makes it exactly the kind of finisher opponents can't cleanly remove before it connects.
Fynn, the Fangbearer
Fynn, the Fangbearer turns any deathtouch creature's combat damage into poison counters, and Tyrranax Rex's toxic 4 with built-in trample means it often deals lethal poison in two swings without needing Fynn's trigger at all — it's redundancy and a clock in one card.
Agent Frank Horrigan
Agent Frank Horrigan rewards stacking keywords on creatures, and Tyrranax Rex brings five of them pre-loaded — ward 4 alone keeps the Rex alive long enough to leverage Horrigan's combat-damage payoffs.
Gishath, Sun's Avatar
Gishath, Sun's Avatar cheats Dinosaurs into play off combat damage, and Tyrranax Rex is one of the most punishing Dinosaurs to flip — haste means it can attack the same turn it lands, potentially triggering another Gishath swing immediately.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
In Commander, Tyrranax Rex is a legitimate finisher in any green shell that can reach eight mana or cheat costs down — ward 4 is nearly impossible to overcome at a table where players split interaction across four opponents. In Modern and Pioneer, it sits in the expensive tier for creature threats and competes with faster clocks, but sees fringe play in ramp shells specifically because ward 4 shuts down most point removal cleanly. Legacy and Vintage have no patience for an eight-mana creature that doesn't win on the spot, so Tyrranax Rex is effectively Commander-and-sometimes-Modern territory. If you're running it outside Commander, you need a ramp engine that gets it into play by turn four — otherwise you're paying full retail for a threat that arrives too late.
Key Combos
Combo lines featuring this card
Price Context
Current price
unknown tier
Pricing data for Tyrranax Rex isn't currently available in this listing, so check Scryfall or TCGPlayer for the live market rate before buying. As a mythic rare with a narrow but dedicated home in poison and Dinosaur Commander builds, it tends to hold value relative to its inclusion rate — verify current stock before picking up copies.
Explore
Sources
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.