Fellwar Stone

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

Cephalid Broker

{T}: Target player draws two cards, then discards two cards.

Weatherseed Faeries

Cephalid Illusionist

Whenever this creature becomes the target of a spell or ability, mill three cards.
{2}{U}, {T}: Prevent all combat damage that would be dealt to and dealt by target creature you control this turn.

Wind Drake

Sisay's Ring

Sky Diamond

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

Cephalid Aristocrat

Whenever this creature becomes the target of a spell or ability, mill two cards.

Aboshan, Cephalid Emperor

Tap an untapped Octopus you control: Tap target permanent.
{U}{U}{U}: Tap all creatures without flying.

War Chariot

{3}, {T}: Target creature gains trample until end of turn.

Crawlspace

No more than two creatures can attack you each combat.

Winding Canyons

{T}: Add {C}.
{2}, {T}: You may cast creature spells this turn as though they had flash.

Flash Flood

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

Wasteland

{T}: Add {C}.
{T}, Sacrifice this land: Destroy target nonbasic land.

Cephalid Coliseum

{T}: Add {U}. This land deals 1 damage to you.
Threshold — {U}, {T}, Sacrifice this land: Target player draws three cards, then discards three cards. Activate only if seven or more cards are in your graveyard.

Cephalid Constable

Whenever this creature deals combat damage to a player, return up to that many target permanents that player controls to their owner's hand.

Twitch

You may tap or untap target artifact, creature, or land.
Draw a card.

Spellbook

Cephalid Sage

Threshold — As long as seven or more cards are in your graveyard, this creature has "When this creature enters, draw three cards, then discard two cards."

Thran Quarry

At the beginning of the end step, if you control no creatures, sacrifice this land.
{T}: Add one mana of any color.

Blasted Landscape

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

Owl Familiar

Flying
When this creature enters, draw a card, then discard a card.

Dismiss

Sea Scryer

Remote Isle

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

Thornwind Faeries

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

Counterspell

Cephalid Looter

{T}: Target player draws a card, then discards a card.

Reflecting Pool

{T}: Add one mana of any type that a land you control could produce.

Giant Octopus

Cephalid Vandal

At the beginning of your upkeep, put a shred counter on this creature. Then mill a card for each shred counter on this creature.

Merfolk Traders

When this creature enters, draw a card, then discard a card.

Mind Bomb

Each player may discard up to three cards. Mind Bomb deals damage to each player equal to 3 minus the number of cards they discarded this way.

Gemstone Mine

This land enters with three mining counters on it.
{T}, Remove a mining counter from this land: Add one mana of any color. If there are no mining counters on this land, sacrifice it.

Curiosity

Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.

Wind Dancer

Flying
{T}: Target creature gains flying until end of turn.

Manakin

Sapphire Medallion

Blue spells you cast cost {1} less to cast.

Cephalid Pathmage

This creature can't be blocked.
{T}, Sacrifice this creature: Target creature can't be blocked this turn.

Dream Cache

Draw three cards, then put two cards from your hand both on top of your library or both on the bottom of your library.

High Tide

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

Fishliver Oil

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature has islandwalk. (It can't be blocked as long as defending player controls an Island.)

Sunken City

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

Cloak of Feathers

Target creature gains flying until end of turn.
Draw a card.

Cephalid Shrine

Whenever a player casts a spell, counter that spell unless that player pays {X}, where X is the number of cards in all graveyards with the same name as the spell.

Aboshan's Desire

Enchant creature
Enchanted creature has flying.
Threshold — Enchanted creature has shroud as long as seven or more cards are in your graveyard. (It can't be the target of spells or abilities.)

Coral Atoll

This land enters tapped.
When this land enters, sacrifice it unless you return an untapped Island you control to its owner's hand.
{T}: Add {C}{U}.

Remove Soul

Storm Crow

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

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.

Theft of Dreams

Draw a card for each tapped creature target opponent controls.

Cephalid Snitch

Sacrifice this creature: Target creature loses protection from black until end of turn.

Mind Stone

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

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.

Touch of Brilliance

Dandân

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

Twiddle

You may tap or untap target artifact, creature, or land.

Disrupt

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

Cephalid Scout

Flying
{2}{U}, Sacrifice a land: Draw a card.

Mystical Tutor

Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.

Inspiration

Worn Powerstone

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

Cephalid Retainer

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

Faerie Conclave

This land enters tapped.
{T}: Add {U}.
{1}{U}: This land becomes a 2/1 blue Faerie creature with flying until end of turn. It's still a land.

Llawan, Cephalid Empress

When Llawan enters, return all blue creatures your opponents control to their owners' hands.
Your opponents can't cast blue creature spells.

Mystic Remora

Cumulative upkeep {1} (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.)
Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays {4}.