Abjure
As an additional cost to cast this spell, sacrifice a blue permanent. Counter target spell.
Apathy
Enchant creature Enchanted creature doesn't untap during its controller's untap step. At the beginning of the upkeep of enchanted creature's controller, that player may discard a card at random. If the player does, untap that creature.
Disrupt
Counter target instant or sorcery spell unless its controller pays {1}. Draw a card.
Fog Elemental
Flying (This creature can't be blocked except by creatures with flying or reach.) When this creature attacks or blocks, sacrifice it at end of combat.
Enchant creature Enchanted creature has "Cumulative upkeep {1}." (At the beginning of its controller's upkeep, that player puts an age counter on it, then sacrifices it unless they pay its upkeep cost for each age counter on it.)
Manta Ray
This creature can't attack unless defending player controls an Island. This creature can't be blocked except by blue creatures. When you control no Islands, sacrifice this creature.
Merfolk Traders
When this creature enters, draw a card, then discard a card.
Ophidian
Whenever this creature attacks and isn't blocked, you may draw a card. If you do, this creature assigns no combat damage this turn.
Phantom Wings
Enchant creature Enchanted creature has flying. Sacrifice this Aura: Return enchanted creature to its owner's hand.
Sage Owl
Flying When this creature enters, look at the top four cards of your library, then put them back in any order.
Tolarian Drake
Flying Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.)
Capsize
Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.) Return target permanent to its owner's hand.
Giant Crab
{U}: This creature gains shroud until end of turn. (It can't be the target of spells or abilities.)
Sea Monster
This creature can't attack unless defending player controls an Island.
Target creature gains shadow until end of turn. (It can block or be blocked by only creatures with shadow.) Draw a card.
Enchant creature (Target a creature as you cast this. This card enters attached to that creature.) Enchanted creature has flying. (It can't be blocked except by creatures with flying or reach.) {U}: Return this Aura to its owner's hand.
Shadow (This creature can block or be blocked by only creatures with shadow.) {U}: Put this creature on top of its owner's library.
Thalakos Seer
Shadow (This creature can block or be blocked by only creatures with shadow.) When this creature leaves the battlefield, draw a card.