Urza, Prince of Kroog, Boommobile, and Parallel Lives

Prerequisites

• Urza, Prince of Kroog on the battlefield
• Boommobile on the battlefield
• Parallel Lives on the battlefield
• available

Steps

1. Activate Urza by paying , creating two token copies of Boommobile that are 1/1 Soldier artifact creatures
2. When the Boommobile tokens enters the battlefield, they trigger, adding that can only be spent to activate abilities
3. Repeat

Results

• Infinite ETB
• Infinite damage
• Infinite creature tokens
• Infinite colored mana that can only be spent to activate abilities
• Infinite creature copies of artifacts you control