Mystic Veil

You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.
Enchant creature
Enchanted creature has shroud. (It can't be the target of spells or abilities.)

Steam Frigate

This creature can't attack unless defending player controls an Island.

Counterspell

Awesome Presence

Enchant creature
Enchanted creature can't be blocked unless defending player pays {3} for each creature they control that's blocking it.

Intervene

Counter target spell that targets a creature.

Tidal Flats

{U}{U}: For each attacking creature without flying, its controller may pay {1}. If that player doesn't, creatures you control blocking that creature gain first strike until end of turn.

Déjà Vu

Return target sorcery card from your graveyard to your hand.

Sea Serpent

This creature can't attack unless defending player controls an Island.
When you control no Islands, sacrifice this creature.

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Sift

Disrupt

Counter target instant or sorcery spell unless its controller pays {1}.
Draw a card.

Diplomatic Immunity

Enchant creature
Shroud (A permanent with shroud can't be the target of spells or abilities.)
Enchanted creature has shroud.

Capsize

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Return target permanent to its owner's hand.

Flood

{U}{U}: Tap target creature without flying.

Phantasmal Terrain

Enchant land
As this Aura enters, choose a basic land type.
Enchanted land is the chosen type.

Aquitect's Will

Put a flood counter on target land. That land is an Island in addition to its other types for as long as it has a flood counter on it. If you control a Merfolk, draw a card.

Mistfolk

{U}: Counter target spell that targets this creature.

Flash Counter

Mightstone

Sea Monster

Bay Falcon

Betrayal

Enchant creature an opponent controls
Whenever enchanted creature becomes tapped, you draw a card.

Reef Shaman

{T}: Target land becomes the basic land type of your choice until end of turn.

Merfolk Looter

Hydroblast

Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.

Giant Shark

This creature can't attack unless defending player controls an Island.
Whenever this creature blocks or becomes blocked by a creature that has been dealt damage this turn, this creature gets +2/+0 and gains trample until end of turn.
When you control no Islands, sacrifice this creature.

High Tide

Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.

Rishadan Cutpurse

When this creature enters, each opponent sacrifices a permanent of their choice unless they pay {1}.

Reef Pirates

Whenever this creature deals damage to an opponent, that player mills a card.

Brilliant Plan

Clairvoyance

Look at target player's hand.
Draw a card at the beginning of the next turn's upkeep.

Dream Thrush

Flying
{T}: Target land becomes the basic land type of your choice until end of turn.

Merchant Ship

This creature can't attack unless defending player controls an Island.
Whenever this creature attacks and isn't blocked, you gain 2 life.
When you control no Islands, sacrifice this creature.

Theft of Dreams

Draw a card for each tapped creature target opponent controls.

Dark Maze

Defender (This creature can't attack.)
{0}: This creature can attack this turn as though it didn't have defender. Exile it at the beginning of the next end step.

Tidal Warrior

{T}: Target land becomes an Island until end of turn.

False Demise

Enchant creature
When enchanted creature dies, return that card to the battlefield under your control.

Vodalian Serpent

Kicker {2} (You may pay an additional {2} as you cast this spell.)
This creature can't attack unless defending player controls an Island.
If this creature was kicked, it enters with four +1/+1 counters on it.

Mana Leak

Counter target spell unless its controller pays {3}.

Jinx

Target land becomes the basic land type of your choice until end of turn.
Draw a card at the beginning of the next turn's upkeep.

Red Cliffs Armada

Invisibility

Enchant creature
Enchanted creature can't be blocked except by Walls.

Flash Flood

Choose one —
• Destroy target red permanent.
• Return target Mountain to its owner's hand.

Keep Watch

Shadow Rift

Target creature gains shadow until end of turn. (It can block or be blocked by only creatures with shadow.)
Draw a card.

Shimmering Mirage

Target land becomes the basic land type of your choice until end of turn.
Draw a card.

Miscalculation

Counter target spell unless its controller pays {2}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Island

Giant Albatross

Flying
When this creature dies, you may pay {1}{U}. If you do, for each creature that dealt damage to this creature this turn, destroy that creature unless its controller pays 2 life. A creature destroyed this way can't be regenerated.

Borrowing 100,000 Arrows

Cloak of Invisibility

Enchant creature
Enchanted creature has phasing and can't be blocked except by Walls. (It phases in or out before its controller untaps during each of their untap steps. While it's phased out, it's treated as though it doesn't exist.)

Dandân

Vision Charm

Choose one —
• Target player mills four cards.
• Choose a land type and a basic land type. Each land of the first chosen type becomes the second chosen type until end of turn.
• Target artifact phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before its controller untaps during their next untap step.)

Sunken City

At the beginning of your upkeep, sacrifice this enchantment unless you pay {U}{U}.
Blue creatures get +1/+1.

Daze

You may return an Island you control to its owner's hand rather than pay this spell's mana cost.
Counter target spell unless its controller pays {1}.

Sea's Claim

Enchant land (Target a land as you cast this. This card enters attached to that land.)
Enchanted land is an Island.

Merchant Scroll

Search your library for a blue instant card, reveal that card, put it into your hand, then shuffle.

Tawnos's Wand

{2}, {T}: Target creature with power 2 or less can't be blocked this turn.

Deep Analysis

Target player draws two cards.
Flashback—{1}{U}, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Arcane Denial

Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep.
You draw a card at the beginning of the next turn's upkeep.

Mind Games

Buyback {2}{U} (You may pay an additional {2}{U} as you cast this spell. If you do, put this card into your hand as it resolves.)
Tap target artifact, creature, or land.

Ghost Ship

Flying
{U}{U}{U}: Regenerate this creature.

Unstable Mutation

Enchant creature
Enchanted creature gets +3/+3.
At the beginning of the upkeep of enchanted creature's controller, put a -1/-1 counter on that creature.

Port Inspector

Whenever this creature becomes blocked, you may look at defending player's hand.