This ingenious engine starts with Mishra, Eminent One turning Worldwalker Helm into a hasty 4/4 combat threat called Mishra's Warform, which also triggers the Helm's replacement effect to spit out an extra Map token right off the bat. Urza, Lord High Artificer acts as the powerhouse mana engine here, allowing you to tap those generated Maps for blue mana while passively bolstering your board with his giant Construct token. With that blue mana fueled by Urza, you can activate Mishra's Warform to copy itself—an action continuously supercharged by Worldwalker Helm's ability to multiply your token creation into a cascade of extra Maps and Warforms. Meanwhile, Fervor ensures that every newly minted creature copy enters ready to tap immediately, cementing an unstoppable loop that generates infinite mana, infinite artifacts, and ultimately lets you exile and cast your entire library.