Spells your opponents cast that target Charix, the Raging Isle cost {2} more to cast.

{3}: Charix gets +X/-X until end of turn, where X is the number of Islands you control.

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 Chromeshell Crab is turned face up, you may exchange control of target creature you control and target creature an opponent controls.

Enchant creature

{2}{U}: Untap enchanted creature.

Totem armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)

Flash

Trample

At the beginning of your upkeep, sacrifice Deep Spawn unless you mill two cards.

{U}: Deep Spawn gains shroud until end of turn and doesn't untap during your next untap step. Tap Deep Spawn. (A creature with shroud can't be the target of spells or abilities.)

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}: Dreadlight Monstrosity can't be blocked this turn. Activate only if you own a card in exile.

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.)

Drownyard Behemoth has hexproof as long as it entered the battlefield this turn.

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

Create a 0/3 blue Crab creature token.

Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Landfall -- Whenever a land enters the battlefield under your control, target player mills three cards.

Defender

When Hightide Hermit enters the battlefield, you get {E}{E}{E}{E} (four energy counters).

Pay {E}{E}: Hightide Hermit can attack this turn as though it didn't have defender.

Homarid enters the battlefield with a tide counter on it.

At the beginning of your upkeep, put a tide counter on Homarid.

As long as there is exactly one tide counter on Homarid, it gets -1/-1.

As long as there are exactly three tide counters on Homarid, it gets +1/+1.

Whenever there are four or more tide counters on Homarid, remove all tide counters from it.

When Homarid Explorer enters the battlefield, target player mills four cards.

{U}: Tap target green creature.

{1}{U}{U}, Sacrifice a blue creature: Create X 1/1 blue Camarid creature tokens, where X is the sacrificed creature's mana value.

{U}: Homarid Warrior gains shroud until end of turn and doesn't untap during your next untap step. Tap Homarid Warrior. (A creature with shroud can't be the target of spells or abilities.)

{U}: Untap Horseshoe Crab.

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

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

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 Mirrorshell Crab: Counter target spell or ability unless its controller pays {3}.

Protection from red

When Purple-Crystal Crab dies, draw a card.

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

Whenever Salvage Scuttler attacks, return an artifact you control to its owner's hand.

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 Scuttlegator has a +1/+1 counter on it, it can attack as though it didn't have defender.

{1}, Discard a card: Create a 0/3 blue Crab creature token.

Delirium -- Crabs you control get +1/+1 as long as there are four or more card types among cards in your graveyard.

{6}{U}{U}: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)

When Shipbreaker Kraken becomes monstrous, tap up to four target creatures. Those creatures don't untap during their controllers' untap steps for as long as you control Shipbreaker Kraken.

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

{6}{U}: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)

As long as Skittering Crustacean is monstrous, it has hexproof. (It can't be the target of spells or abilities your opponents control.)

When Specimen Collector enters the battlefield, create a 1/1 green Squirrel creature token and a 0/3 blue Crab creature token.

When Specimen Collector dies, create a token that's a copy of target token you control.

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 to a creature.)

Whenever Thassa's Emissary or enchanted creature deals combat damage to a player, draw a card.

Enchanted creature gets +3/+3.

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.

{U}: Viscerid Deepwalker gets +1/+0 until end of turn.

Suspend 4--{U} (Rather than cast this card from your hand, you may pay {U} and exile it with four time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost. It has haste.)

{T}, Sacrifice a creature and a Swamp: Destroy target nonartifact creature. It can't be regenerated.

{T}, Sacrifice a creature and a snow Swamp: Destroy target creature. It can't be regenerated.

Wormfang Crab can't be blocked.

When Wormfang Crab enters the battlefield, an opponent chooses a permanent you control other than Wormfang Crab and exiles it.

When Wormfang Crab leaves the battlefield, return the exiled card to the battlefield under its owner's control.