Mobile Garrison, Aggravated Assault, and Chromatic Orrery

Prerequisites

• Mobile Garrison on the battlefield
• Aggravated Assault on the battlefield
• Chromatic Orrery on the battlefield
• Mobile Garrison is a creature and does not have summoning sickness
• An opponent is unable to block and kill Mobile Garrison

Steps

1. Declare Mobile Garrison as an attacker
2. Mobile Garrison triggers, untapping Chromatic Orrery
3. Move to your postcombat main phase
4. Activate Chromatic Orrery by tapping it, adding at least
5. Activate Aggravated Assault by paying , untapping all creatures you control and causing you to get an additional combat and main phase after this one
6. Repeat

Results

• Infinite combat phases
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control