Coral Eel

Armageddon

Cruel Fate

Look at the top five cards of target opponent's library. Put one of those cards into that player's graveyard and the rest on top of their library in any order.

Deep-Sea Serpent

This creature can't attack unless defending player controls an Island.

Djinn of the Lamp

Déjà Vu

Return target sorcery card from your graveyard to your hand.

Exhaustion

Creatures and lands target opponent controls don't untap during their next untap step.

Flux

Each player discards any number of cards, then draws that many cards.
Draw a card.

Giant Octopus

Horned Turtle

Ingenious Thief

Flying
When this creature enters, look at target player's hand.

Man-o'-War

When this creature enters, return target creature to its owner's hand.

Armored Pegasus

Merfolk of the Pearl Trident

Mystic Denial

Counter target creature or sorcery spell.

Portal