Infinite blue mana, Exile your library, Cast all spells in your library, Infinite Map tokens
Create a copy of Worldwalker Helm, which will also create a Map token.
Activate Urza's first ability by tapping a Worldwaker Helm and a Map, adding .
Activate a Worldwalker Helm by paying 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 .
Repeat from step 3.
Component Cards
How It Works
Create a copy of Worldwalker Helm, which will also create a Map token.
Activate Urza's first ability by tapping a Worldwaker Helm and a Map, adding .
Activate a Worldwalker Helm by paying 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 .
Repeat from step 3.