Brandywine Farmer, Infinite Reflection, Cauldron Familiar, and Ashnod's Altar

Prerequisites

• Brandywine Farmer on the battlefield
• Infinite Reflection on the battlefield
• Cauldron Familiar in the graveyard
• Ashnod's Altar on the battlefield
• Infinite Reflection attached to Brandywine Farmer
• You control a Food

Steps

1. Activate Cauldron Familiar by sacrificing a Food, returning it to the battlefield from your graveyard as a copy of Brandywine Farmer due to Infinite Reflection
2. When Cauldron Familiar enters the battlefield, it triggers, creating a Food artifact token
3. Activate Ashnod's Altar by sacrificing Cauldron Familiar, adding
4. When Cauldron Familiar dies, it triggers, creating a Food artifact token
5. Repeat for infinite Food tokens
6. Activate Ashnod's Altar by sacrificing Brandywine Farmer, adding
7. When Brandywine Farmer dies, it triggers, creating a Food artifact token
8. Activate Cauldron Familiar by sacrificing a Food, returning it to the battlefield from your graveyard
9. When Cauldron Familiar enters the battlefield, it triggers, causing each opponent to lose 1 life and you to gain one life
10. Activate Ashnod's Altar by sacrificing Cauldron Familiar, adding
11. Repeat from step 8

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite Food tokens
• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss
• Infinite LTB
• Infinite sacrifice triggers