Urza, Lord High Artificer, Pili-Pala, and Grand Architect

Prerequisites

• Urza, Lord High Artificer on the battlefield
• Pili-Pala on the battlefield
• Grand Architect on the battlefield
• Pili-Pala does not have summoning sickness
• available

Steps

1. Turn Pili-Pala into a blue creature using Architect's first ability
2. Tap Pili-Pala, generating using Architect's second ability
3. Pay to untap Pili-Pala, generating
4. Repeat until you have infinite mana
5. Use Urza, Lord High Artificer's ability to exile your entire library and cast any cards without paying their mana costs

Results

• Cast any cards from your library
• Infinite colored mana
• Exile your library
• Cast all cards in your library without paying their mana costs