Animus of Predation Avatar Kyoshi, Earthbender Awakened Skyclave Awakening of Vitu-Ghazi Axebane Ferox Badgermole Badgermole Cub Balustrade Wurm Beastcaller Savant Brave the Wilds Bumi's Feast Lecture Bumi, Eclectic Earthbender Bumi, King of Three Trials Caldaia Guardian Caldaia Strongarm Centaur Chieftain Cliffrunner Behemoth Colossal Growth Concordant Crossroads Cosmium Confluence Cracked Earth Technique Cragplate Baloth Craterhoof Behemoth Crocodile of the Crossing Demolisher Spawn Desert Warfare Destiny Spinner Dire Wolf Prowler Disturbed Slumber Druid Class Durkwood Baloth Earth Kingdom General Earth Rumble Earthbending Lesson Earthbending Student Earthen Ally Earthen Arms Elemental Uprising Ellywick Tumblestrum Embodiment of Insight End-Raze Forerunners Fin-Clade Fugitives Finale of Devastation Flinthoof Boar Frenzied Baloth Froghemoth Fungal Behemoth Gaea's Revenge Giant Dustwasp Glacier Godmaw Glissa's Retriever Goldvein Hydra Golgari Raiders Groundbreaker Gruul Beastmaster Gruul Scrapper Harmonious Emergence Haru, Hidden Talent Hedge Whisperer Hellcat, Undying Vigilante Hercules, Prince of Power Hit-Monkey Howling Galefang Hunting Wilds Instill Energy Interplanar Brushwagg (playtest) Jubilation Kamahl's Will Kamahl, Heart of Krosa Karvanista, Loyal Lupari Karvanista, Loyal Lupari Leatherhead, Iron Gator

A $200 buy-in seems pretty reasonable to me given the fact that Crop Rotation could be reprinted in a Masters-esque set any minute
This win condition is kept in check by cheap spot removal like Doom Blade or Path to Exile
I struggled anytime I tried the Emerald and Ruby deck, while my opponent flourished with it
Black and red often cares about sacrificing permanents, and its no different for March of the Machine