Chromeshell Crab
Creature — Crab Beast
Morph 
(You may cast this card face down as a 2/2 creature for 
. Turn it face up any time for its morph cost.)
When this creature is turned face up, you may exchange control of target creature you control and target creature an opponent controls.
- CMC
- 5
- Mana cost
- Color identity
- U
- Rarity
- rare
- Set
- Commander 2019
- Price
- $0.23
- EDHREC rank
- #9261
Chromeshell Crab swaps a creature you control with a creature an opponent controls — a permanent, on-board exchange that can steal a game-winning threat or offload a liability. The morph cost makes it free to cast face-down with Kadena, Slinking Sorcerer on the battlefield, which means the swap arrives with effectively no mana investment the turn it resolves.
Best Commanders
Commanders with the highest synergy
Kadena, Slinking Sorcerer
Kadena, Slinking Sorcerer makes the first morph each turn cost zero, so Chromeshell Crab enters free and immediately threatens a creature swap that can rip a combo piece or finisher right off an opponent's board.
Charix, the Raging Isle
Charix, the Raging Isle is a Crab tribal commander, and Chromeshell Crab earns its slot on type alone — but the exchange ability also gives the deck a way to steal blockers or reassign a problematic creature without needing a dedicated removal package.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | not legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Commander is where Chromeshell Crab actually matters. Morph decks — especially those led by Kadena, Slinking Sorcerer — treat it as a recurring threat that opponents have to respect on every face-down creature you deploy. Outside of Commander, Chromeshell Crab is legal in Legacy, Vintage, and Oathbreaker, but a five-mana morph that trades creatures is far too slow and narrow to see play in those formats. Stick to Commander.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.23 bulk tier
At $0.23, Chromeshell Crab is deep bulk — easy to pick up in a trade binder or throw into a cart as a filler card. Bulk rares with narrow applications rarely spike, so don't expect the price to move unless a new morph-matters commander pushes demand.
Explore
Sources
Mentioned
- Kadena, Slinking Sorcerer
- Charix, the Raging Isle
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.