Devoid (This card has no color.)

Counter target spell unless its controller pays {1}. You create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}." ({C} represents colorless mana.)

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.

Enchant creature

Enchanted creature gets +1/+1 and has flying.

When Augur of Bolas enters the battlefield, look at the top three cards of your library. You may reveal an instant or sorcery card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Target creature gets -4/-0 until end of turn.

Draw a card.

Creatures your opponents control get -4/-0 until end of turn.

Draw a card.

Counter target spell.

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

Enchant creature

When Capture Sphere enters the battlefield, tap enchanted creature.

Enchanted creature doesn't untap during its controller's untap step.

{4}{U}: Target creature can't be blocked this turn.

This spell has flash as long as you control a Merfolk.

Return target creature to its owner's hand.

Draw a card.

Tap target creature. It doesn't untap during its controller's next untap step.

Draw a card.

Creatures your opponents control get -1/-0.

Inspired -- Whenever Deepwater Hypnotist becomes untapped, target creature an opponent controls gets -3/-0 until end of turn.

Draw two cards.

Tap up to three target creatures.

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

Enchant creature

Enchanted creature has "{1}{U}, {T}: Target player mills three cards."

Flying

As long as you control another Wizard, Expedition Diviner has "When this creature dies, draw a card."

{1}{U}, Sacrifice Font of Fortunes: Draw two cards.

Tap up to two target creatures. Those creatures don't untap during their controller's next untap step.

You may tap or untap target permanent, then you may tap or untap another target permanent.

Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Enchant creature

Enchanted creature has base power and toughness 0/2.

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

Spells your opponents cast that target a Merfolk you control cost {2} more to cast.

Abilities your opponents activate that target a Merfolk you control cost {2} more to activate.

Draw a card.

Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Whenever Library Larcenist attacks, draw a card.

{U}: Manta Riders gains flying until end of turn.

When you cast this spell, copy it if you control a planeswalker, Cleric, Druid, Shaman, Warlock, or Wizard.

Scry 1, then draw a card.

{U}, {T}: Target player mills two cards.

When Merfolk Observer enters the battlefield, look at the top card of target player's library.

Other Merfolk creatures you control get +1/+1.

{T}: Target Merfolk creature can't be blocked this turn.

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

Whenever Merfolk Spy deals combat damage to a player, that player reveals a card at random from their hand.

Mist-Cloaked Herald can't be blocked.

Draw three cards. Then discard two cards unless you discard a creature card.

Bestow {4}{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.)

Enchanted creature gets +2/+3.

When Paperfin Rascal enters the battlefield, clash with an opponent. If you win, put a +1/+1 counter on Paperfin Rascal. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)

Draw two cards. Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Draw a card.

Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

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.

Enchant creature

Enchanted creature has base power and toughness 0/2.

When Riverwise Augur enters the battlefield, draw three cards, then put two cards from your hand on top of your library in any order.

Put target artifact or creature on top of its owner's library.

Whenever Scroll Thief deals combat damage to a player, draw a card.

Whenever a Merfolk you control deals combat damage to a player, draw a card.

{4}{U}: Seafloor Stalker gets +1/+0 until end of turn and can't be blocked this turn. This ability costs {1} less to activate for each creature in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

Shaper Apprentice has flying as long as you control another Merfolk.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

When Shipwreck Dowser enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

As an additional cost to cast this spell, reveal a Merfolk card from your hand or pay {3}.

When Silvergill Adept enters the battlefield, draw a card.

Enchant creature

When Singing Bell Strike enters the battlefield, tap enchanted creature.

Enchanted creature doesn't untap during its controller's untap step.

Enchanted creature has "{6}: Untap this creature."

Enchant land

Enchanted land has "{T}: Target creature gains flying until end of turn. Activate only as a sorcery."

{1}{U}, {T}: Draw a card, then discard a card.

Storm Sculptor can't be blocked.

When Storm Sculptor enters the battlefield, return a creature you control to its owner's hand.

Target creature gets -4/-0 until end of turn. If you control a Wizard, draw a card.

Counter target spell unless its controller pays {1}. Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Kicker {4} (You may pay an additional {4} as you cast this spell.)

When Tazeem Roilmage enters the battlefield, if it was kicked, return target instant or sorcery card from your graveyard to your hand.

Counter target spell unless its controller pays {X}, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)

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

Triton Shorestalker can't be blocked.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Suspend 4--{1}{U} (Rather than cast this card from your hand, you may pay {1}{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.)

When the last time counter is removed from Veiling Oddity while it's exiled, creatures can't be blocked this turn.

{U}, Sacrifice Vessel of Paramnesia: Target player mills three cards. Draw a card.

When Watertrap Weaver enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

Draw two cards.

Put target attacking or blocking creature on top of its owner's library.

Flying

Whenever Windrider Patrol deals combat damage to a player, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)