Cowardice, Mirage Mirror, Myr Battlesphere, Krark-Clan Ironworks, and Genesis Chamber

Prerequisites

• Cowardice on the battlefield
• Mirage Mirror on the battlefield
• Myr Battlesphere in hand
• Krark-Clan Ironworks on the battlefield
• Genesis Chamber on the battlefield
• available

Steps

1. Cast Myr Battlesphere by paying
2. Myr Battlesphere enters the battlefield, triggering itself and Genesis Chamber
3. Resolve the Myr Battlesphere trigger, creating four 1/1 Myr artifact creature tokens
4. Resolve the Genesis Chamber trigger, creating a 1/1 Myr artifact creature token
5. Activate Krark-Clan Ironworks five times by sacrificing the Myr tokens, adding ten
6. Activate Mirage Mirror by paying , targeting Myr Battlesphere
7. Cowardice triggers, returning Myr Battlepshere from the battlefield to your hand
8. Mirage Mirror's ability fails to resolve due to no longer having a legal target
9. Repeat

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count