Kumena, Tyrant of Orazca Kicking things off with perhaps the best MTG commander for a Merfolk tribal deck we have Kumena, Tyrant of Orazca
Most of the upgrades to the deck involve removing subthemes that contribute little to the song strategy, and replace them with more efficient cards
Darksteel Colossus 5 Only better than Blightsteel in that it works towards the same win condition as your other dorks and so this can finish someone off or get them in range such than something else will finish them off
While doing so, the player can activate mana abilities only if they're from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card
And then , when your opponent finally points removal at your combo piece, Commander, Stax piece, or even your Blightsteel Colossus, Welding Jar will always be there, ready to bite the bullet, all so you can win the game uncontested
