It can only evolve from Dark Machoke
I asked Cameron of the Laboratory Maniacs YouTube channel if he could tell me succinctly what the rough guidelines for a cEDH deck were, and like the overachiever that he is, he wrote me a detailed, multi-page breakdown of the cEDH theorycrafting behind lands and mana sources
We can fill up our hand even more with Gholdengo exs very own Coin Bonus ability, which lets us draw a card, and an additional one if they are in the active position
Graded Population Report: Shadow Rider Calyrex VMAX #281 Visualize the distrbution of grades in the chart
Locations are also harder to deal with than most other card types, making a well-defended location like this a nightmare to deal with
I expect you'll need to have a really strong red-blue spellslinger deck to make this playable - though with the MTG Final Fantasy release date almost upon us, I'll be eating my words soon enough if I'm wrong