Other Merfolk creatures you control get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)

Other Merfolk creatures you control get +1/+1. {T}: Target Merfolk creature can't be blocked this turn.

Reveal any number of blue cards in your hand. Counter target spell unless its controller pays {1} for each card revealed this way.

When this creature dies, change the base power and toughness of all creatures that dealt damage to it this turn to 0/2. (This effect lasts indefinitely.)

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Defender This creature gets +2/+0 as long as you control an Island. {2}, {T}: Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

When this creature enters, return each other creature you control to its owner's hand.

This creature can't attack unless defending player controls an Island. {U}, Sacrifice an Island: Target land becomes an Island until end of turn.

This creature can't attack unless defending player controls an enchantment or an enchanted permanent.

This creature can't be blocked unless defending player controls three or more creatures that share a creature type.

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

Hexproof (This creature can't be the target of spells or abilities your opponents control.) Whenever this creature deals combat damage to a player, if you control no other creatures, look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Whenever this creature attacks, exile it. Return it to the battlefield under your control tapped and attacking at the beginning of the declare attackers step on your next turn.

First strike, protection from red

{1}{U}: Change this creature's base power to target creature's power. (This effect lasts indefinitely.)

Whenever you cast a kicked spell, this creature has base power and toughness 5/5 until end of turn.

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

Flying When this creature enters, return two target lands you control to their owner's hand.

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

Flying, protection from red

Flying

Serpent of the Endless Sea's power and toughness are each equal to the number of Islands you control. This creature can't attack unless defending player controls an Island.

Flying Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.) Whenever this creature phases in, target creature phases out. (It phases in before its controller untaps during their next untap step.)

Flying At the beginning of your upkeep, sacrifice this creature unless you pay {U}.

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

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

Flying This creature gets +1/+0 for each basic Island you control.

Whenever this creature attacks, sacrifice it unless you sacrifice an Island.

Flying {3}{U}: Tap all creatures with toughness 2 or less. {3}{U}: All other creatures lose flying until end of turn.

Flying {U}, {T}, Discard a card: Return target permanent you control to its owner's hand.

Defender

Defender (This creature can't attack.) {U}: This creature gets +1/+0 until end of turn.

Kicker {U} (You may pay an additional {U} as you cast this spell.) Flying When this creature enters, if it was kicked, return all other creatures to their owners' hands and you skip your next turn.

Flying When this creature enters, create a Map token. (It's an artifact with "{1}, {T}, Sacrifice this token: Target creature you control explores. Activate only as a sorcery.")

Cycling {2} ({2}, Discard this card: Draw a card.)

You may play an additional land on each of your turns. Landfall — Whenever a land you control enters, you may draw a card.

{T}: Draw a card.

Flying (This creature can't be blocked except by creatures with flying or reach.) When this creature dies, you may draw a card.

{3}{U}: Draw a card.

Whenever a creature you control deals combat damage to a player, you may draw a card. {1}{U}, {T}: Creatures your opponents control attack this turn if able.

Draw four cards, then choose X cards in your hand and discard the rest.

When this creature dies, draw a card.

You may return two Islands you control to their owner's hand rather than pay this spell's mana cost. Draw two cards.

+1: Until your next turn, prevent all damage that would be dealt to and dealt by target permanent an opponent controls. −1: Draw a card. You may play an additional land this turn. −5: You get an emblem with "At the beginning of your end step, create a 9/9 blue Kraken creature token."

This spell costs {2} less to cast if you control a Human creature and a non-Human creature. Draw two cards.

Look at the top three cards of your library, then put them back in any order. You may shuffle. Draw a card.

Draw two cards, then sacrifice a permanent.

Svyelun has indestructible as long as you control at least two other Merfolk. Whenever Svyelun attacks, draw a card. Other Merfolk you control have ward {1}. (Whenever another Merfolk you control becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.)

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 this creature or enchanted creature deals combat damage to a player, draw a card. Enchanted creature gets +3/+3.

Choose one — • Look at the top X cards of your library. Put up to two of them into your hand and the rest on the bottom of your library in a random order. • Counter target spell unless its controller pays twice {X}.

{4}: Scry 1, then reveal the top card of your library. If it's a land card, put it onto the battlefield tapped. Otherwise, draw a card. Partner (You can have two commanders if both have partner.)

When this creature enters, reveal the top four cards of your library. Put all Merfolk cards revealed this way into your hand and the rest on the bottom of your library in any order. {3}{U}: This creature gains flying until end of turn.

Tishana's power and toughness are each equal to the number of cards in your hand. You have no maximum hand size. When Tishana enters, draw a card for each creature you control.

Draw two cards. Then discard a card unless you return a land you control to its owner's hand.

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

Enchant land At the beginning of the upkeep of enchanted land's controller, destroy that land unless that player pays {1} or 1 life.

Cumulative upkeep {2} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) As this enchantment enters, choose two basic land types. Basic lands of the first chosen type are the second chosen type.

All creatures lose flying and islandwalk.

When this creature enters, you may return target card with awaken from your graveyard to your hand. Land creatures you control have flying.

Trample Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Shroud (This creature can't be the target of spells or abilities.)

X target creatures gain islandwalk until end of turn. (They can't be blocked as long as defending player controls an Island.)

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

This creature can't be blocked.

As this creature enters, choose a player. This creature has protection from the chosen player.

Kinship — At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with this creature, you may reveal it. If you do, each creature you control gains flying until end of turn.

Tap all blue creatures.

Create a 5/5 blue Wall creature token with defender. Sacrifice it at the beginning of the next end step.

Creatures your opponents control get -2/-0 until end of turn.

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

{T}, Pay 1 life, Sacrifice this land: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.

Whenever you cast a planeswalker spell, you gain 1 life. {T}: Add {C}. {1}, {T}: Add two mana of different colors. Spend this mana only to cast planeswalker spells.

({T}: Add {U}.)

This land enters tapped with two depletion counters on it. {T}, Remove a depletion counter from this land: Add {U}{U}. If there are no depletion counters on this land, sacrifice it.

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.) This land enters tapped. {T}: Add {U}. {U}, {T}: You may play the exiled card without paying its mana cost if a library has twenty or fewer cards in it.

({T}: Add {G} or {U}.)

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.

Target player mills X cards, where X is the number of lands you control.

This creature can't attack unless defending player controls an Island. {T}: This creature deals 1 damage to any target. When you control no Islands, sacrifice this creature.