Geometer's Arthropod

Whenever you cast a spell with {X} in its mana cost, look at the top X cards of your library. Put one of them into your hand and the rest on the bottom of your library in a random order.

"Creatures that have survived blood-soaked millennia should not be underestimated."
—Nev, dean of substance

Mutagen

Crustacean Commando

"Wondering what I've got in the box? Pain, soldier! And lots of it!"
—Herman

When this creature enters, create a Mutagen token. (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")

Despite their diminutive size, mirelurk hatchlings can swarm the unwary, attacking just moments after escaping their eggs.

Ruin Crab

Landfall — Whenever a land you control enters, each opponent mills three cards. (To mill a card, a player puts the top card of their library into their graveyard.)

"If you boys is wasting time, then yer wasting money! And that's just sick!"

Charix, the Raging Isle

Spells your opponents cast that target Charix cost {2} more to cast.
{3}: Charix gets +X/-X until end of turn, where X is the number of Islands you control.

Some of Zendikar's oddest creatures, hedron crabs decorate their shells with the most peculiar materials.

Hedron Crab

Landfall — Whenever a land you control enters, target player mills three cards. (They put the top three cards of their library into their graveyard.)

"ATTENTION BEACHGOERS: This is a litter-free zone. Violators will be pinched."

Gilded Scuttler

This creature can't be blocked.
When this creature enters, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Though Captain Riptide's corpse was mostly recovered from the shipwreck, no one ever managed to find his favorite hat.

Shorecomber Crab

With sandy beaches in short supply, Duskmourn's crabs have adapted to burrow into everything from carpet to flesh.

Scrabbling Skullcrab

Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, target player mills two cards. (They put the top two cards of their library into their graveyard.)

Eddymurk Crab

Flash
This spell costs {1} less to cast for each instant and sorcery card in your graveyard.
This creature enters tapped if it's not your turn.
When this creature enters, tap up to two target creatures.

Crabomination

Emerge from artifact {5}{B}{B} (You may cast this spell by sacrificing an artifact and paying the emerge cost reduced by that artifact's mana value.)
When this creature enters, target opponent exiles the top card of their library, a card at random from their graveyard, and a card at random from their hand. You may cast a spell from among cards exiled this way without paying its mana cost.

They cluster near shallow river crossings, blending into the rocks, waiting for unsuspecting travelers to step within range of their claws.

Canyon Crab

{1}{U}: This creature gets +2/-2 until end of turn.
At the beginning of your end step, if you haven't cast a spell from your hand this turn, draw a card, then discard a card.

Mirelurk Queen

Radiation

Vigilance
When this creature enters, target player gets two rad counters.
Whenever one or more nonland cards are milled, draw a card, then put a +1/+1 counter on this creature. This ability triggers only once each turn.

"That little fella is deadly in his own fashion."
—The Mariner

Red Death, Shipwrecker

Alluring Eyes — {T}: Goad target creature an opponent controls. That player draws a card. You add {R}. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

The Crab Queen

Whenever The Crab Queen attacks, create a token that's a copy of one of the following at random: Skitter Eel; Skittering Crustacean; Ruin Crab; Charix, the Raging Isle; Scuttletide; or Heartstone.

Scuttling Sentinel

Flash
Vigilance
When this creature enters, put a +1/+1 counter on another target creature you control. Until end of turn, that creature becomes a blue Crab in addition to its other types and gains hexproof. (It can't be the target of spells or abilities your opponents control.)

Carnival Carnivore

Ticket Bucket-Bot

Somehow only the third-most dangerous ride in the park.

Deathtouch
When Carnival Carnivore enters, you get {TK}, then you may put a sticker on a nonland permanent you own.

Uchuulon

Copy

Uchuulon's power is equal to the number of Crabs, Oozes, and/or Horrors you control.
Horrific Symbiosis — At the beginning of your end step, exile up to one target creature card from an opponent's graveyard. If you do, create a token that's a copy of this creature.

Mirrorshell Crab

Ward {3} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {3}.)
Channel — {2}{U}, Discard this card: Counter target spell or ability unless its controller pays {3}.

Dreadlight Monstrosity

Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)
{3}{U}{U}: This creature can't be blocked this turn. Activate only if you own a card in exile.

Hard Evidence

Scuttletide

Crab

Specimen Collector

To an explorer, a priceless treasure. To the crab, a rock to call home.

Zendikar's seas are deeper than anyone can fathom.

It loves blending into its environment, ambushing prey, and long scuttles on the beach.

Crystacean

Flash (You may cast this spell any time you could cast an instant.)

Chromeshell Crab

Morph

Morph {4}{U} (You may cast this card face down as a 2/2 creature for {3}. 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.

Its shell can withstand anything but a thaw.

Iceberg Cancrix

Whenever another snow permanent you control enters, you may have target player mill two cards.

"Life has no mistakes, only experiments."
—Yolov, Simic bioengineer

Skitter Eel

{2}{U}: Adapt 2. (If this creature has no +1/+1 counters on it, put two +1/+1 counters on it.)

Scuttlegator

Defender
{6}{G/U}{G/U}: Adapt 3. (If this creature has no +1/+1 counters on it, put three +1/+1 counters on it.)
As long as this creature has a +1/+1 counter on it, it can attack as though it didn't have defender.

Sharktocrab

{2}{G}{U}: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever one or more +1/+1 counters are put on this creature, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

Growth-Chamber Guardian

{2}{G}: Adapt 2. (If this creature has no +1/+1 counters on it, put two +1/+1 counters on it.)
Whenever one or more +1/+1 counters are put on this creature, you may search your library for a card named Growth-Chamber Guardian, reveal it, put it into your hand, then shuffle.

"What wishes do they grant? Mostly pinching-related ones."
—Omik, superintendent of waterworks

Wishcoin Crab

A precious shell without, a delicious taste within.

Purple-Crystal Crab

The banks of the Luxa River attract all manner of predator but only the most resilient of prey.

Ancient Crab

A hermit crab goes through many shells in its lifetime, and not all are natural in origin.

Salvage Scuttler

Whenever this creature attacks, return an artifact you control to its owner's hand.

Hightide Hermit

Energy Reserve

Defender
When this creature enters, you get {E}{E}{E}{E} (four energy counters).
Pay {E}{E}: This creature can attack this turn as though it didn't have defender.

Skittering Crustacean

{6}{U}: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)
As long as this creature is monstrous, it has hexproof. (It can't be the target of spells or abilities your opponents control.)

Drownyard Behemoth

Flash (You may cast this spell any time you could cast an instant.)
Emerge {7}{U} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.)
This creature has hexproof as long as it entered this turn.

Vexing Scuttler

Emerge {6}{U} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.)
When you cast this spell, you may return target instant or sorcery card from your graveyard to your hand.

After the fall of Sea Gate and the draining of the Halimar basin, the crab set off to find a new home.

Thassa's Emissary

Bestow {5}{U} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.)
Whenever this creature or enchanted creature deals combat damage to a player, draw a card.
Enchanted creature gets +3/+3.

Shambleshark

Flash (You may cast this spell any time you could cast an instant.)
Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

Unbreakable and unappetizing, the crab grows uninterrupted, sometimes to the size of a cottage and beyond.

Fortress Crab

Creatures displaced from time still turn up every year, stranded by the temporal disaster that once swept across Dominaria.

Armored Cancrix

"Yeah, they've got a lot of meat. The only downside to eating 'em is that you often find human bones and body parts inside."
—Jaby, Silundi Sea nomad

Jwari Scuttler

Hedrons perplex minds both great and small.

Wormfang Crab

This creature can't be blocked.
When this creature enters, an opponent chooses a permanent you control other than this creature and exiles it.
When this creature leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Riptide Crab

Vigilance
When this creature dies, draw a card.

"I'm constantly amazed by the tenacity of living creatures on this plane. Even in the stronghold's white-hot core, life persists."
—Ertai

Oraxid

"I'm allergic to shellfish—not only did it kill my entire village, it also gave me this nasty rash."
—Olivia, fisher

King Crab

{1}{U}, {T}: Put target green creature on top of its owner's library.

In the final days before the disaster, all the crabs on Tolaria migrated from inlets, streams, and ponds back to the sea. No one took note.

Horseshoe Crab

During the giant crabs' mating season, Skyshroud nights are filled with the clatter of their skirmishes.

Giant Crab

{U}: This creature gains shroud until end of turn. (It can't be the target of spells or abilities.)

The Crabs ofMagic the Gathering

Geometer's Arthropod

Secrets of Strixhaven

Geometer's Arthropod

Secrets of Strixhaven

Crustacean Commando

Teenage Mutant Ninja Turtles

Ruin Crab

Secret Lair Drop

Charix, the Raging Isle

Secret Lair Drop

Hedron Crab

Secret Lair Drop

Gilded Scuttler

Foundations Jumpstart

Shorecomber Crab

Foundations Jumpstart

Scrabbling Skullcrab

Duskmourn: House of Horror

Eddymurk Crab

Bloomburrow

Crabomination

Modern Horizons 3

Canyon Crab

Outlaws of Thunder Junction