Singles

Counter target spell if its mana value is less than or equal to the highest mana value among permanents you control.

Whenever an opponent casts a spell, counter that spell and put a depletion counter on Decree of Silence. If there are three or more depletion count...

Morph {4}{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 Chromeshell Crab is tu...

{1}: Choose a creature type other than Wall. Target creature becomes that type until end of turn.

Return target creature and target land to their owners' hands.

Target player skips their next draw step.

Draw two cards, then discard two cards. Untap up to three lands.

Search target player's library for up to seven cards and exile them. Then that player shuffles.

As Shifting Sky enters the battlefield, choose a color. All nonland permanents are the chosen color.

You may return two Islands you control to their owner's hand rather than pay this spell's mana cost. Tap all creatures.

Flying (This creature can't be blocked except by creatures with flying or reach.) {1}{U}: Return Fleeting Image to its owner's hand.

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

Sacrifice a land: Coastal Hornclaw gains flying until end of turn.

Cephalid Pathmage can't be blocked. {T}, Sacrifice Cephalid Pathmage: Target creature can't be blocked this turn.

When Tidal Courier enters the battlefield, reveal the top four cards of your library. Put all Merfolk cards revealed this way into your hand and th...

Target player gains control of target permanent you control.

Gain control of target creature with mana value X or less.

When Day of the Dragons enters the battlefield, exile all creatures you control. Then create that many 5/5 red Dragon creature tokens with flying. ...

At the beginning of your upkeep, put a shred counter on Cephalid Vandal. Then mill a card for each shred counter on Cephalid Vandal.

You may return an Island you control to its owner's hand rather than pay this spell's mana cost. Counter target spell unless its controller pays {1}.

If an opponent has no cards in hand, this spell costs {6} less to cast. Flying

Enchant creature {U}: Return enchanted creature and Disappear to their owners' hands.

When Delusions of Mediocrity enters the battlefield, you gain 10 life. When Delusions of Mediocrity leaves the battlefield, you lose 10 life.

Target land becomes the basic land type of your choice until end of turn. Draw a card.