Essentially, if you have a full party with all four of these on the board, you can pay one white, one blue, and one black mana to give the Warrior lifelink, deathtouch, and make him unblockable (deathtouch and unblockable at the same time has no real use, but thats still OP to think about)
These cards are playable in Outlaws of Thunder Junction Draft and Sealed when opened from Play Boosters
Draw on the first turn: Because Commander is typically multiplayer, the starting player still draws a card on turn one
"I have played it three times and it has actually won twice," Potatowheelchair admitted
You can go deeper on the +1/+1 counter synergies, you can try to find some more interesting, niche explore creatures, or you can dig into The Lost Caverns of Ixalan for more synergistic merfolk
Muddle has many ways to mix up a decklist, so follow along as I show you what I did to stir up boardstates