Urza, Lord High Artificer + Worldwalker Helm + Saheeli's Artistry

Prerequisites

• You have enough mana to cast Saheeli's Artistry

Steps

1. 1Create a copy of Worldwalker Helm, which will also create a Map token.
2. 2Activate Urza's first ability by tapping a Worldwaker Helm and a Map, adding .
3. 3Activate 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.
4. 4Activate Urza's first ability twice by tapping two Maps, adding .
5. 5Repeat from step 3.

Effects

• Cast all spells in your library
• Exile your library
• Infinite blue mana
• Infinite Map tokens