One other thing to note--I took the above image directly from TCGplayer after sorting by price
It arrives to the battlefield as a 12/12 with Doubling Season, and then one mana and pull off makes two flying counters, and one mana and pull off gives this two back, so it'll grow by +1/+1 each iteration, and is an infinite combo with any color or no of mana
When combined with cards that allow you to play additional lands on your turn plus landfall cards, this nifty little nonbasic can serve as an unheralded hero of such strategies
Suggested includes: The Gitrog Monster - doubles down on land-sac draw and turbo-charges your yard
Peri can help us ramp out both our commander and powerful historic threats, while Romana doubles up the copied tokens created by Six
But it serves the same purpose, really