9. Green/Black Rock

Ascending is easy with saprolings. You can quickly work up an army of 3/3s that your opponent won't be able to deal with. 

G/B Saprolings Decklist on Aetherhub

While not precisely a rock deck, there are many builds that explore the same strategies as the classic midrange deck. There are a number of Jund and other G/B/x decks designed to win games of attrition. In the current Arena meta, one standout is the G/B saprolings deck. The engine of the deck is saproling production. G/B Saprolings goes wide with an army of tokens and uses them to fuel a range of effects.

The deck runs five ways to make saprolings, including a few repeatable effects. You can sacrifice saprolings for life with Thallid Omnivore or removal through Vicious Offering. Sporecrown Thallid gives your field extra strength for attack and defense. Slimefoot, the Stowaway, Tendershoot Dryad and Song of Freyalise all serve as formidable ways to end the game. This deck’s explosive potential could turn it into a real threat.