Merfolk Thaumaturgist

{T}: Switch target creature's power and toughness until end of turn.

Spellstutter Sprite

Flash
Flying
When Spellstutter Sprite enters the battlefield, counter target spell with mana value X or less, where X is the number of Faeries you control.

Oona's Grace

Target player draws a card.
Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Stonybrook Angler

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

Tome Raider

Flying
When Tome Raider enters the battlefield, draw a card.

Whirlpool Rider

When Whirlpool Rider enters the battlefield, shuffle the cards from your hand into your library, then draw that many cards.

Transmutation

Switch target creature's power and toughness until end of turn.

Dream Thief

Flying
When Dream Thief enters the battlefield, draw a card if you've cast another blue spell this turn.

Wistful Thinking

Target player draws two cards, then discards four cards.

Faerie Seer

Flying
When Faerie Seer enters the battlefield, scry 2.

Weatherseed Faeries

Shaper Apprentice

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

Briarberry Cohort

Flying
Briarberry Cohort gets +1/+1 as long as you control another blue creature.

Flitting Guerrilla

Flying
When Flitting Guerrilla dies, each player mills two cards. Then you may exile Flitting Guerrilla. When you do, put target creature or battle card from your graveyard on top of your library. (To mill two cards, a player puts the top two cards of their library into their graveyard.)

Faerie Duelist

Flash
Flying
When Faerie Duelist enters the battlefield, target creature an opponent controls gets -2/-0 until end of turn.

Latchkey Faerie

Flying
Prowl {2}{U} (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Faerie or Rogue.)
When Latchkey Faerie enters the battlefield, if its prowl cost was paid, draw a card.

Pixie Guide

Flying
Grant an Advantage — If you would roll one or more dice, instead roll that many dice plus one and ignore the lowest roll.

Faerie Macabre

Flying
Discard Faerie Macabre: Exile up to two target cards from graveyards.

Dewdrop Spy

Flash
Flying
When Dewdrop Spy enters the battlefield, look at the top card of target player's library.

Library Larcenist

Whenever Library Larcenist attacks, draw a card.

Merfolk Coralsmith

{1}: Merfolk Coralsmith gets +1/-1 until end of turn.
When Merfolk Coralsmith dies, scry 2.

Gitaxian Mindstinger

Deathtouch
Whenever Gitaxian Mindstinger deals combat damage to a player or battle, draw a card.

Aetherblade Agent

Deathtouch
{4}{U/P}: Transform Aetherblade Agent. Activate only as a sorcery. ({U/P} can be paid with either {U} or 2 life.)

Aetherblade Agent // Gitaxian Mindstinger

Mocking Sprite

Flying
Instant and sorcery spells you cast cost {1} less to cast.

Canal Courier

When Canal Courier enters the battlefield, you become the monarch.
Whenever Canal Courier and another creature attack different players, Canal Courier can't be blocked this combat.

Rathi Trapper

Siren of the Silent Song

Flying
Inspired — Whenever Siren of the Silent Song becomes untapped, each opponent discards a card, then each opponent mills a card.

Freed from the Real

Enchant creature
{U}: Tap enchanted creature.
{U}: Untap enchanted creature.

Deepwater Hypnotist

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

Thieving Sprite

Flying
When Thieving Sprite enters the battlefield, target player reveals X cards from their hand, where X is the number of Faeries you control. You choose one of those cards. That player discards that card.

Surveilling Sprite

Flying
When Surveilling Sprite dies, you may draw a card.

Merfolk Looter

Pestermite

Flash
Flying
When Pestermite enters the battlefield, you may tap or untap target permanent.

Waterwind Scout

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

Chilling Trap

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

Silvergill Douser

{T}: Target creature gets -X/-0 until end of turn, where X is the number of Merfolk and/or Faeries you control.

Soulknife Spy

Whenever Soulknife Spy deals combat damage to a player, draw a card.

River Herald Scout

When River Herald Scout enters the battlefield, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

Stream of Unconsciousness

Barrow Naughty

Flying
Barrow Naughty has lifelink as long as you control another Faerie.
{2}{B}: Barrow Naughty gets +1/+0 until end of turn.

Jhessian Thief

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever Jhessian Thief deals combat damage to a player, draw a card.

Oko's Accomplices

Guildsworn Prowler

Deathtouch
When Guildsworn Prowler dies, if it wasn't blocking, draw a card.

Merfolk Pupil

When Merfolk Pupil enters the battlefield, draw a card, then discard a card.
{1}{U}, Exile Merfolk Pupil from your graveyard: Draw a card, then discard a card.