When Benthicore comes into play, put two 1/1 blue Merfolk Wizard creature tokens into play.Tap two untapped Merfolk you control: Untap Benthicore. It gains shroud until end of turn. (It can’t be the target of spells or abilities.)

Enchant creatureAt the end of your turn, clash with an opponent. If you win, gain control of enchanted creature. Otherwise, that player gains control of enchanted creature. (Each clashing player reveals the top card of his or her library, then puts that card on the top or bottom. A player wins if his or her card had a higher converted mana cost.)

Tap an untapped Merfolk you control: Target player puts the top card of his or her library into his or her graveyard.

Changeling (This card is every creature type at all times.)Creatures target player controls get -2/-0 and lose all creature types until end of turn.

FlyingEthereal Whiskergill can’t attack unless defending player controls an Island.

Whenever Fallowsage becomes tapped, you may draw a card.

As an additional cost to play Familiar’s Ruse, return a creature you control to its owner’s hand.Counter target spell.

FlyingWhenever you play a spell during an opponent’s turn, you may return target creature you control to its owner’s hand.

IslandwalkWhen Merrow Harbinger comes into play, you may search your library for a Merfolk card, reveal it, then shuffle your library and put that card on top of it.

Other Merfolk creatures you control get +1/+1.Whenever you play a Merfolk spell, you may tap or untap target permanent.

As an additional cost to play Silvergill Adept, reveal a Merfolk card from your hand or pay %3.When Silvergill Adept comes into play, draw a card.

Changeling (This card is every creature type at all times.)%1%U: Switch Turtleshell Changeling’s power and toughness until end of turn.