Urza, Lord High Artificer + Worldwalker Helm + Urza, Prince of Kroog
Produces: Infinite ETB, Infinite creature tokens, Infinite blue mana, Exile your library, Cast all spells in your library, Infinite creature copies of artifacts you control, Infinite Map tokens



- Color identity
- WU
- Mana
- {6}
Steps
- Activate Urza, Prince of Kroog by paying {6}, creating a token copy of Worldwalker Helm that is a 1/1 Soldier and creating a Map token.
- Activate Urza, Lord High Artificer'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, Lord High Artificer's first ability twice by tapping two Maps, adding {U}{U}.
- Repeat from step 3.