Cards like Losheel, Clockwork Scholar, Krang, Utrom Warlord, and Steel Overseer reward you for filling your deck with artifact creatures or cards like Pinnacle Emissary that create artifact creature tokens
That means that each color would have twelve slots (sixty divided by five for those math impaired)
Additions: Cuts: Here's how the deck looks with the upgrades added: Further Upgrades Enchantress has an absurdly large card pool so there's tons of upgrade options, more than you could ever fit in a single deck: Serra's Sanctum, Urza's Saga, Hall of Heliod's Generosity, all the relevant fetchlands / shocks / ABU duals / bondlands / checklands / slowlands Lands: Utopia Sprawl, Birds of Paradise, Smothering Tithe Ramp: Argothian Enchantress, Femeref Enchantress Card Draw: Aura of Silence, Aura Shards Removal: Replenish, Whip of Erebos Recursion: Enlightened Tutor, Vampiric Tutor, Demonic Tutor, there's also Idyllic Tutor but my hot take is 3 mana tutors ain't good enough Tutors: Anointed Procession, Parallel Lives Tokens: Sphere of Safety, Timely Ward Protection: All Done
Magus of the Order is a great budget tutor for any creature-heavy deck
The variable leveling cost was changed to avoid making a ton of creatures as powerful or complex as Figure of Destiny