You also have a few pieces to slow your opponents down, namely Collector Ouphe and Back to Basics
As you build your cube list, keep the distribution of cards as symmetrical as possible
Its an almost Herculean task to narrow the list down from over 3,400 cards, and then rank the ones remaining from worst to best
And there you have it: the top ten elementals in the Commander format
Legendary Artifact The Ooze Whenever a creature you control with a +1/+1 counter on it leaves the battlefield, create a Mutagen token for each +1/+1 counter on it
Sun-Blessed Peak, Kyoshi Village, and Serpent's Pass are helpful in fixing mana, then provide that umph of a card when you to draw a second card, or need a late card