Dave Humpherys talked about some of the design philosophies for Alchemy when the format was announced
Your deck is built around a single legendary creature (the "commander," which can be cast multiple times), and can use only cards within that creature's color idenity
24 Spells Ancient Stirrings Boreal Druid Search for Tomorrow Unbridled Growth Joraga Treespeaker Wild Growth Grapple with the Past Satyr Wayfinder Explore Mind Stone Warping Wail Walking Ballista Matter Reshaper Dismember Ramunap Excavator Though-Knot Seer Surrak, Hunt Caller Garruk, Wildspeaker Reality Smasher Ishkana, the Grafwidow Nissa, Vital Force Endbringer Worldbreaker Emrakul, the Promised End 16 Lands Llanowar Wastes Karplusan Forest Grove of the Burnwillows Hashep Oasis Kessig Wolf Run Eldrazi Temple Wastes Taiga Wooded Foothills Ash Barrens Wastelands Field of Ruin 4 Forests A few other cards that would work nicely in this list
Thankfully, they added the number of lands you control clause so that Armageddon for nothing isnt one of the spells
The main goal of the deck is to build around Otharri, Suns Glory and its ability to summon Rebel tokens
3rd ANNIVERSARY COMPLETE GUIDE