There is a solid mana base with enough basic lands for consistency
Your opponents are forced to attack each other, either leaving themselves wide open for another attack or losing their blockers
sharks are a less popular creature type than humans so it follows that itll have less targets for its activated ability, but it's still a pinger for whenever you cycle or discard a card
A few of them have an optional scene or sidequest or the like, but outside of those, anyone who joins permanently will never say another line of dialog again, nor will their presence ever be noted by anyone else
Especially in Commander, four life is easy to get and having a 4/4 blocker out of it is the icing on the cake
In that same vein Court of AmbitionCourt of Ambition not only adds the Monarch to the game, but also forces our opponents to lose three life or discard a card if we aren't the Monarch OR double that if we are