Urza, Lord High Artificer, Pili-Pala, and Forensic Gadgeteer

Prerequisites

• Urza, Lord High Artificer on the battlefield
• Pili-Pala on the battlefield
• Forensic Gadgeteer on the battlefield

Steps

1. Activate Urza's first ability by tapping Pili-Pala, adding
2. Activate Pili-Pala by paying and untapping it, adding one mana of any color
3. Repeat

Results

• Cast all spells in your library
• Exile your library
• Infinite colored mana