Barrin, Master Wizard, Mana Echoes, and Myr Battlesphere

Prerequisites

• Barrin, Master Wizard on the battlefield
• Mana Echoes on the battlefield
• Myr Battlesphere in hand
• available

Steps

1. Cast Myr Battlesphere by paying
2. Myr Battlesphere enters the battlefield, triggering itself and Mana Echoes
3. Resolve the Myr Battlesphere trigger, creating four 1/1 Myr creature tokens
4. The four Myr tokens enter the battlefield, triggering Mana Echoes four times
5. Resolve all Mana Echoes triggers, adding at least 25
6. Activate Barrin by paying and sacrificing a Myr token, returning Myr Battlesphere from the battlefield to your hand
7. Repeat

Results

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