Have

Shorecomber Crab

Coral Commando

Tolarian Terror

This spell costs {1} less to cast for each instant and sorcery card in your graveyard.
Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)

Coral Eel

Ancestral Reminiscence

Soaring Drake

Aegis Turtle

Owl Familiar

Flying
When this creature enters, draw a card, then discard a card.

Caelorna, Coral Tyrant

Storm Crow

Flying (This creature can't be blocked except by creatures with flying or reach.)

Bellowing Crier

When this creature enters, draw a card, then discard a card.

River Herald Scout

When this creature enters, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

Leapfrog

This creature has flying as long as you've cast an instant or sorcery spell this turn.

Daring Thunder-Thief

Sage of Days

When this creature enters, look at the top three cards of your library. You may put one of those cards back on top of your library. Put the rest into your graveyard.

Transit Mage

When this creature enters, you may search your library for an artifact card with mana value 4 or 5, reveal it, put it into your hand, then shuffle.

Giant Octopus

Thieving Otter

Whenever this creature deals damage to an opponent, draw a card.

Academy Wall

Defender
Whenever you cast an instant or sorcery spell, you may draw a card. If you do, discard a card. This ability triggers only once each turn.