If you were a genius child who played by every rule and mastered nuanced strategies, then you're probably an exception, as most of us struggled to make sense of the rules
Being able to cast instants and sorceries that you exile for free is as good a reason as any to load up on cloning spells
Modern Horizons 3 Modern Horizons 3 has cards that can create a token copy of Bloomburrow Bloomburrow had not one but two token mechanics
Final Fantasy has an artifact theme in Esper led by Noctis, Prince of Lucis, which lets us cast artifacts from our graveyard, and supported by cards including Golbez, Crystal Collector, Ashe, Princess of Dalmasca, and Edgar, King of Figaro
Here is the official link for Collecting March of the Machine: Thats got all the information we need for most of this
This card might be too slow as a 4-mana enchantment that needs additional mana investment in your commander(s) but I respect the high ceiling