This brilliant engine takes off by combining Mishra, Eminent One and Worldwalker Helm during your combat phase to turn the Helm into a 4/4 Mishra's Warform while generating an extra Map token. Because Worldwalker Helm’s activated ability lets you copy any artifact token you control, and Mishra's Warform is itself an artifact, you can repeatedly copy the Warform—with Worldwalker Helm’s replacement effect multiplying your token creation into a cascade of additional Warforms and Maps. Meanwhile, Urza, Lord High Artificer acts as the ultimate engine hub, instantly converting your newly minted Map tokens into blue mana to pay for the copying loops. Once you have infinite mana and tokens, Urza's five-mana ability lets you exile and cast every single spell from your library, backed up by Garna, the Bloodflame, whose static ability ensures all your creatures hit the battlefield with haste ready to win the game.