Ygra, Eater of All, Cauldron Familiar, Ashnod's Altar, and Desecrated Tomb

Prerequisites

• Ygra, Eater of All on the battlefield
• Cauldron Familiar in the graveyard
• Ashnod's Altar on the battlefield
• Desecrated Tomb on the battlefield

Steps

1. Activate Cauldron Familiar by sacrificing a Food
2. Ygra triggers, putting two +1/+1 counters on it
3. Resolve the Cauldron Familiar ability, returning it from your graveyard to the battlefield
4. Cauldron Familiar and Desecrated Tomb trigger
5. Resolve the Desecrated Tomb trigger, creating a creature token
6. Resolve the Cauldron Familiar trigger, causing each opponent to lose 1 life and you to gain 1 life
7. Activate Ashnod's Altar by sacrificing Cauldron Familiar
8. When Cauldron Familiar dies, Ygra triggers, putting two +1/+1 counters on it
9. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite colorless mana
• Infinite lifegain triggers
• Infinite lifegain
• Infinite lifeloss
• Infinite +1/+1 counters on a creature