Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)

Other Merfolk creatures you control get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)

Other Merfolk creatures you control get +1/+1. {T}: Target Merfolk creature can't be blocked this turn.

Flash If an opponent would draw a card except the first one they draw in each of their draw steps, instead you create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

{T}: Draw a card, then discard a card.

Whenever a Merfolk you control deals combat damage to a player, draw a card.

Counter target spell.

Enchant creature You control enchanted creature.

Counter target spell.

Sacrifice this creature: Counter target instant or sorcery spell unless its controller pays {1}.

Counter target spell. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Whenever a spell or ability you control counters a spell, you may create a 1/1 blue Merfolk creature token. Tap seven untapped Merfolk you control: Counter target spell.

Flash When this creature enters, tap target creature an opponent controls. It loses all abilities until end of turn.

Counter target noncreature spell.

This creature can't be blocked.