Sunken City

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

Waterfront Bouncer

{U}, {T}, Discard a card: Return target creature to its owner's hand.

Mistform Seaswift

Flying
{1}: This creature becomes the creature type of your choice until end of turn.
Morph {1}{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.)

Sleight of Hand

Look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.

Unsummon

Return target creature to its owner's hand.

Sage Owl

Flying
When this creature enters, look at the top four cards of your library, then put them back in any order.

Lonely Sandbar

This land enters tapped.
{T}: Add {U}.
Cycling {U} ({U}, Discard this card: Draw a card.)

Bay Falcon

Zephyr Falcon

Covert Operative

Remove Soul

Killer Whale

{U}: This creature gains flying until end of turn.

Fellwar Stone

{T}: Add one mana of any color that a land an opponent controls could produce.

Fledgling Osprey

This creature has flying as long as it's enchanted.

Star Compass

This artifact enters tapped.
{T}: Add one mana of any color that a basic land you control could produce.

Skywing Aven

Flying
Discard a card: Return this creature to its owner's hand.

Seal of Removal

Sacrifice this enchantment: Return target creature to its owner's hand.

Abjure

As an additional cost to cast this spell, sacrifice a blue permanent.
Counter target spell.

Coast Watcher

Stormwatch Eagle

Flying
Sacrifice a land: Return this creature to its owner's hand.

Aesthir Glider

Impulse

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.

Memory Lapse

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

Mistform Wall

This creature has defender as long as it's a Wall.
{1}: This creature becomes the creature type of your choice until end of turn.

Aven Fisher

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

Terminal Moraine

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

Manakin

Stormscape Familiar

Flying
White spells and black spells you cast cost {1} less to cast.

Foil

You may discard an Island card and another card rather than pay this spell's mana cost.
Counter target spell.

Inspiration

Island

Mind Stone

{T}: Add {C}.
{1}, {T}, Sacrifice this artifact: Draw a card.

Prohibit

Kicker {2} (You may pay an additional {2} as you cast this spell.)
Counter target spell if its mana value is 2 or less. If this spell was kicked, counter that spell if its mana value is 4 or less instead.

Kingfisher

Flying
When this creature dies, draw a card.

Sisay's Ring

Crookclaw Elder

Flying
Tap two untapped Birds you control: Draw a card.
Tap two untapped Wizards you control: Target creature gains flying until end of turn.

Wayward Soul

Flying
{U}: Put this creature on top of its owner's library.

Sigil of Sleep

Enchant creature
Whenever enchanted creature deals damage to a player, return target creature that player controls to its owner's hand.

Shoreline Ranger

Flying
Islandcycling {2} ({2}, Discard this card: Search your library for an Island card, reveal it, put it into your hand, then shuffle.)

Coastal Hornclaw

Sacrifice a land: This creature gains flying until end of turn.

Airborne Aid

Draw a card for each Bird on the battlefield.

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.

Sea Scryer

Aven Envoy

Mistform Dreamer

Flying
{1}: This creature becomes the creature type of your choice until end of turn.

Spire Owl

Keeneye Aven

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

Scry 1. (Look at the top card of your library. You may put that card on the bottom.)
Draw a card.

Dream Thrush

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

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.

Repulse

Return target creature to its owner's hand.
Draw a card.

Peregrine Drake

Flying
When this creature enters, untap up to five lands.

Storm Crow

Flying (This creature can't be blocked except by creatures with flying or reach.)

Robe of Mirrors

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature has shroud. (It can't be the target of spells or abilities.)

Thornwind Faeries

Flying
{T}: This creature deals 1 damage to any target.

Ghost Ship

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

Aven Fogbringer

Flying
When this creature enters, return target land to its owner's hand.

Exclude

Counter target creature spell.
Draw a card.

Ascending Aven

Flying
This creature can block only creatures with flying.
Morph {2}{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.)

Veil of Birds

When an opponent casts a spell, if this permanent is an enchantment, it becomes a 1/1 Bird creature with flying.

Apprentice Wizard

Power Sink

Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Aven Windreader

Flying (This creature can't be blocked except by creatures with flying or reach.)
{1}{U}: Target player reveals the top card of their library.

Brainstorm

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

Mercurial Kite

Flying
Whenever this creature deals combat damage to a creature, tap that creature. That creature doesn't untap during its controller's next untap step.

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.)

Counterspell

Sky Diamond

This artifact enters tapped.
{T}: Add {U}.

Remote Isle

This land enters tapped.
{T}: Add {U}.
Cycling {2} ({2}, Discard this card: Draw a card.)