This not only buffs the damage capabilities and survivability of your merfolk, but it also allows them to more easily deal damage without being intercepted by blockers
The energy generation and versatility of the deck are enhanced by Magneton's Volt Charge ability, which can retrieve Lightning Energy from the Energy Zone
Likewise, fulfilling cards requirements to unleash a massive summon feels very climactic
Being quicker to setup so that they can either act as a revenge attacker or carry the deck during parts of the game where the main attacker cannot
Plus, Angus is a cheap 3 mana and can be dropped and used very early in the game
While there wont be Commander decks for this set, theres plenty of risk in a bonus sheet, Secret Lairs, or Special Guest inclusions