In essence, Ditto enables you to kickstart your battle with your chosen Pokmon in the active position, even if you didn't draw it initially
Koffing Meowth Arbok Wobbuffet Answer: Meowth 6 What Pokmon has Ash never caught
Snarling Gorehound and Gnawing Vermin are ideal for this, dropping plenty of cards into the yard for very little mana
Since there isn't really a whole lot more to say about playing Mystic Confluence (again, if you're playing blue in Commander, stick a copy in your deckyou won't be sorry), let's instead take a walk down memory lane and look at the history of flexible "choose one" modal spells in Magic
It however is clearly a homage to "pop art" and this is more than intentional
While it is a Green creature and therefore you need a Green and color(s) deck to cast him, fixing three, four and five color mana bases got another new toy to help out