Urza, Lord High Artificer + Worldwalker Helm + Mirrorworks
Produces: Infinite blue mana, Exile your library, Cast all spells in your library, Infinite Map tokens
- Urza, Lord High Artificer
- Worldwalker Helm
- Mirrorworks
- Color identity
- U
- Mana
- {4}{U}
Steps
- Cast Worldwalker Helm by paying {2}{U}.
- When Worldwalker Helm enters the battlefield, Mirrorworks triggers, causing you to pay {2} to create a token copy of Worldwalker Helm and a Map token.
- Activate Urza's first ability by tapping a Worldwaker Helm and a Map, adding {U}{U}.
- Activate a Worldwalker Helm by paying {1}{U} and tapping it, creating a token copy of the Worldwalker Helm token and a Map token for each Worldwalker Helm you control.
- Activate Urza's first ability twice by tapping two Maps, adding {U}{U}.
- Repeat from step 4.