Unwelcome Sprite

Flying
Whenever you cast a spell during an opponent's turn, surveil 2. (Look at the top two cards of your library. You may put any number of them into your graveyard and the rest on top of your library in any order.)

Wanderbrine Trapper

{1}, {T}, Tap another untapped creature you control: Tap target creature an opponent controls.

Protective Response

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Destroy target attacking or blocking creature.

Wild Unraveling

As an additional cost to cast this spell, blight 2 or pay {1}. (To blight 2, put two -1/-1 counters on a creature you control.)
Counter target spell.

Prideful Feastling

Changeling (This card is every creature type.)
Lifelink

Omni-Changeling

Changeling (This card is every creature type.)
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
You may have this creature enter as a copy of any creature on the battlefield, except it has changeling.

Island

Silvergill Peddler

Whenever this creature becomes tapped, draw a card, then discard a card.

Glamermite

Flash
Flying
When this creature enters, choose one —
• Tap target creature.
• Untap target creature.

Pyrrhic Strike

As an additional cost to cast this spell, you may blight 2. (You may put two -1/-1 counters on a creature you control.)
Choose one. If this spell's additional cost was paid, choose both instead.
• Destroy target artifact or enchantment.
• Destroy target creature with mana value 3 or greater.

Wanderwine Distracter

Whenever this creature becomes tapped, target creature an opponent controls gets -3/-0 until end of turn.

Mischievous Sneakling

Changeling (This card is every creature type.)
Flash

Changeling Wayfinder

Changeling (This card is every creature type.)
When this creature enters, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Temporal Cleansing

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
The owner of target nonland permanent puts it into their library second from the top or on the bottom.

Plains

Sun-Dappled Celebrant

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Vigilance

Wanderwine Farewell

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Return one or two target nonland permanents to their owners' hands. Then if you control a Merfolk, create a 1/1 white and blue Merfolk creature token for each permanent returned to its owner's hand this way.

Gravelgill Scoundrel

Vigilance
Whenever this creature attacks, you may tap another untapped creature you control. If you do, this creature can't be blocked this turn.

Eclipsed Merrow

When this creature enters, look at the top four cards of your library. You may reveal a Merfolk, Plains, or Island card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Stratosoarer

Flying
When this creature enters, target creature gains flying until end of turn.
Basic landcycling {1}{U} ({1}{U}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Deepchannel Duelist

At the beginning of your end step, untap target Merfolk you control.
Other Merfolk you control get +1/+1.

Tributary Vaulter

Flying
Whenever this creature becomes tapped, another target Merfolk you control gets +2/+0 until end of turn.

Curious Colossus

When this creature enters, each creature target opponent controls loses all abilities, becomes a Coward in addition to its other types, and has base power and toughness 1/1.

Keep Out

Choose one —
• Keep Out deals 4 damage to target tapped creature.
• Destroy target enchantment.

Glamer Gifter

Flash
Flying
When this creature enters, choose up to one other target creature. Until end of turn, that creature has base power and toughness 4/4 and gains all creature types.

Appeal to Eirdu

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
One or two target creatures each get +2/+1 until end of turn.

Tam, Mindful First-Year

Each other creature you control has hexproof from each of its colors.
{T}: Target creature you control becomes all colors until end of turn.

Run Away Together

Choose two target creatures controlled by different players. Return those creatures to their owners' hands.

Feisty Spikeling

Changeling (This card is every creature type.)
During your turn, this creature has first strike.

Sygg's Command

Choose two —
• Create a token that's a copy of target Merfolk you control.
• Creatures target player controls gain lifelink until end of turn.
• Target player draws a card.
• Tap target creature. Put a stun counter on it.

Swat Away

This spell costs {2} less to cast if a creature is attacking you.
The owner of target spell or creature puts it on their choice of the top or bottom of their library.

Unexpected Assistance

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Draw three cards, then discard a card.

Spiral into Solitude

Enchant creature
Enchanted creature can't attack or block.
{1}{W}, Blight 1, Sacrifice this Aura: Exile enchanted creature. (To blight 1, put a -1/-1 counter on a creature you control.)