Bello, Bard of the Brambles, Aggravated Assault, and Chromatic Orrery

Prerequisites

• Bello, Bard of the Brambles on the battlefield
• Aggravated Assault on the battlefield
• Chromatic Orrery on the battlefield

Steps

1. Activate Chromatic Orrery's first ability by tapping it, adding
2. Activate Aggravated Assault by paying , untapping all creatures you control and causing you to get an additional combat and main phase after this one
3. Repeat

Results

• Infinite combat phases
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinite untap of non-Equipment artifacts you control with mana value 4 or greater
• Infinite mana non-Equipment artifacts with mana value 4 or greater you control can produce