Guide of Souls, Dr. Madison Li, Thornbite Staff, Myr Battlesphere, and Ashnod's Altar

Prerequisites

• Guide of Souls on the battlefield
• Dr
• Madison Li on the battlefield
• Thornbite Staff on the battlefield
• Myr Battlesphere in the graveyard
• Ashnod's Altar on the battlefield

Steps

1. Activate Dr Madison Li's third ability by tapping it and paying , returning Myr Battlesphere from your graveyard to the battlefield
2. When Myr Battlepshere enters the battlefield, it and Guide of Souls trigger
3. Resolve the Myr Battlesphere trigger, creating four 1/1 Myr artifact creature tokens
4. When the Myrs enter the battlefield, Guide of Souls triggers four times
5. Resolve all Guide of Souls triggers, causing you to get and gain 5 life
6. Activate Ashnod's Altar by sacrificing Myr Battlesphere, adding
7. When Myr Battlesphere dies, Dr Madison Li triggers, untapping itself
8. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite lifegain
• Infinite lifegain triggers
• Infinite sacrifice triggers