Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Flying

Whenever a source deals damage to Belltower Sphinx, that source's controller mills that many cards.

Enchant creature an opponent controls

Whenever enchanted creature becomes tapped, you draw a card.

{U}: Blockade Runner can't be blocked this turn.

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

Whenever you cast a spell during an opponent's turn, put a +1/+1 counter on Brineborn Cutthroat.

Bubbling Beebles can't be blocked as long as defending player controls an enchantment.

Flash

Enchant creature

Enchanted creature has flying.

Callaphe's power is equal to your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)

Creatures and enchantments you control have "Spells your opponents cast that target this permanent cost {1} more to cast."

Enchant land

Whenever enchanted land becomes tapped, its controller mills three cards.

Whenever Crosstown Courier deals combat damage to a player, that player mills that many cards.

Target player mills four cards.

Splice onto Arcane {1}{U} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Enchant land

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

Enchant creature

Enchanted creature loses all abilities and is a blue Frog creature with base power and toughness 1/1. (It loses all other card types and creature types.)

Tap target creature. Its controller mills two cards. That creature doesn't untap during its controller's next untap step. (They put the top two cards of their library into their graveyard.)

Draw a card.

Kinship -- At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with Ink Dissolver, you may reveal it. If you do, each opponent mills three cards.

Flash

Flying

Whenever you cast a Wizard spell, you may untap Inspired Sprite.

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

Morph {4}{U}{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.)

When Kheru Spellsnatcher is turned face up, counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard. You may cast that card without paying its mana cost for as long as it remains exiled.

Whenever Library Larcenist attacks, draw a card.

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

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.

When Merrow Witsniper enters the battlefield, target player mills a card.

At the beginning of your upkeep, scry 1.

Whenever you discard a card, each opponent mills two cards. (They put the top two cards of their library into their graveyard.)

Raid -- At the beginning of your end step, if you attacked this turn, target opponent mills four cards.

Enchant creature

{U}: Untap enchanted creature.

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

{U}: Enchanted creature gains shroud until end of turn. (It can't be the target of spells or abilities.)

{1}: Enchanted creature gets +1/-1 or -1/+1 until end of turn.

Enchant creature

{U}: Untap enchanted creature.

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

{U}: Enchanted creature gains shroud until end of turn. (It can't be the target of spells or abilities.)

{1}: Enchanted creature gets +1/-1 or -1/+1 until end of turn.

{U}, {T}: You may tap or untap target creature.

Whenever Reef Pirates deals damage to an opponent, that player mills a card.

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

Return target permanent to its owner's hand.

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

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

{1}, {T}: Tap target land.

Whenever another blue creature enters the battlefield under your control, target player mills two cards.

{T}: Add {C}.

{1}, {T}: Add {U}.

Sacrifice Seal of Removal: Return target creature to its owner's hand.

Flash

Enchant creature

Enchanted creature gets -2/-0. It gets -6/-0 instead as long as its controller has seven or more cards in their graveyard.

Search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle.

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

Merfolk spells and Wizard spells you cast cost {1} less to cast.

Svyelun of Sea and Sky 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}.)

Whenever Towering-Wave Mystic deals damage, target player mills that many cards.

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