Urza, Lord High Artificer + Worldwalker Helm + Urza, Prince of Kroog

Prerequisites

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Steps

1. 1Activate Urza, Prince of Kroog by paying , creating a token copy of Worldwalker Helm that is a 1/1 Soldier and creating a Map token.
2. 2Activate Urza, Lord High Artificer'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, Lord High Artificer'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 creature copies of artifacts you control
• Infinite creature tokens
• Infinite ETB
• Infinite Map tokens