Mishra, Eminent One, Urza, Lord High Artificer, Worldwalker Helm, and Samut, Voice of Dissent

Prerequisites

• Mishra, Eminent One on the battlefield
• Urza, Lord High Artificer on the battlefield
• Worldwalker Helm on the battlefield
• Samut, Voice of Dissent on the battlefield
• available

Steps

1. At the beginning of your combat phase, Mishra triggers, creating a token copy of Worldwalker Helm that is a 4/4 Construct artifact creature with haste named Mishra's Warform, and a Map token
2. Activate Urza's first ability by tapping a Map, adding
3. Activate Mishra's Warform by paying and tapping it, creating a token copy of it and a Map token for each Mishra's Warform and/or Worldwalker Helm you control
4. Activate Urza's first ability twice by tapping two Maps, adding
5. Repeat from step 3

Results

• Infinite ETB
• Infinite blue mana
• Infinite tapped creature tokens
• Exile your library
• Cast all cards in your library without paying their mana costs
• Infinite Map tokens