Unsummon

Return target creature to its owner's hand.

Dungeon Geists

Flying
When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control this creature.

Engulf the Shore

Return to their owners' hands all creatures with toughness less than or equal to the number of Islands you control.

Air Elemental

River's Rebuke

Return all nonland permanents target player controls to their owner's hand.

Winged Words

This spell costs {1} less to cast if you control a creature with flying.
Draw two cards.

Galestrike

Return target tapped creature to its owner's hand.
Draw a card.

Claustrophobia

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Moat Piranhas

Frost Lynx

When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

Aven Wind Mage

Flying
Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn.

Agent of Treachery

When this creature enters, gain control of target permanent.
At the beginning of your end step, if you control three or more permanents you don't own, draw three cards.

Warden of Evos Isle

Flying
Creature spells with flying you cast cost {1} less to cast.

Cryptic Serpent

This spell costs {1} less to cast for each instant and sorcery card in your graveyard.

Salvager of Secrets

When this creature enters, return target instant or sorcery card from your graveyard to your hand.

Sphinx of Enlightenment

Flying
When this creature enters, target opponent draws a card and you draw three cards.

Decision Paralysis

Tap up to two target creatures. Those creatures don't untap during their controller's next untap step.

Rise from the Tides

Create a tapped 2/2 black Zombie creature token for each instant and sorcery card in your graveyard.

Island

Dramatic Reversal

Untap all nonland permanents you control.

Captivating Gyre

Return up to three target creatures to their owners' hands.

Brineborn Cutthroat

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 this creature.