As long as a player is not playing a mono-colored deck, all non-basic lands are made nearly useless, preventing a player from casting the majority of their colored spells
Midrange Decks in Duel Commander Slimefoot and Squee is the perfect Midrange deck with a mana curve slightly higher than Phelia, that tries to play a mana dork almost always on Turn 1 and follow it up its commander as early as Turn 2
Cast the Adventure side to mill your opponent, then cast the creature to stop early aggro
I just wish that, in a vacuum, the Final Fantasy Commander decks had a more comprehensive and consistent mana base overall
Got a Prized Amalgam to come back as well
Thanks to your interest in commons, you can't leave today without learning about the Pauper format which is all about commons, and thankfully not many of the format's highly-played cards made it to this ranking