Denizen of the Deep

Creature — Serpent

Breaching Leviathan

Creature — Leviathan

Aethersquall Ancient

Creature — Leviathan

Summon: Leviathan

Enchantment Creature — Saga Leviathan

Upheaval

Sorcery

Slinn Voda, the Rising Deep

Legendary Creature — Leviathan

Perennial Behemoth

Artifact Creature — Beast

Trench Behemoth

Creature — Kraken

Sea God's Scorn

Sorcery

Yarok's Wavecrasher

Creature — Elemental

Leviathan

Creature — Leviathan

Cyclone Summoner

Creature — Giant Wizard

Wormfang Behemoth

Creature — Nightmare Fish Beast

Whelming Wave

Sorcery

Vedalken Mastermind

Creature — Vedalken Wizard

Flood of Tears

Sorcery

Devastation Tide

Sorcery

Etherium Abomination

Artifact Creature — Horror

Churning Eddy

Sorcery

Cache Raiders

Creature — Merfolk Rogue

Aether Gale

Sorcery

Unsummon

Instant

Symbol of Unsummoning

Sorcery

Evacuation

Instant

Iceridge Serpent

Creature — Serpent

Rimekin Recluse

Creature — Elemental Wizard

First-Sphere Gargantua

Creature — Phyrexian Horror

Scourge of Fleets

Creature — Kraken

Thing from the Deep

Creature — Leviathan

Part the Veil

Instant — Arcane

Waterwhirl

Instant