Merfolk Sovereign

Flying Battle Squadron's power and toughness are each equal to the number of creatures you control.

Counter target creature spell.

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.) As long as this creature is renowned, it has menace. (It can't be blocked except by two or more creatures.)

Other Goblin creatures you control attack each combat if able. At the beginning of combat on your turn, create a 1/1 red Goblin creature token with haste. Whenever this creature attacks, it gets +1/+0 until end of turn for each other attacking Goblin.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Whenever this creature deals combat damage to a player, you may draw that many cards.

(T: Add U.)

4, T, Exile this artifact: Exile target creature.

Protection from red Elemental creatures you control get +1/+1. When this creature enters, create a number of 1/0 blue Elemental creature tokens equal to your devotion to blue. (Each U in the mana costs of permanents you control counts toward your devotion to blue.)