Ygra, Eater of All, Cauldron Familiar, Altar of Dementia, and Skeleton Crew

Prerequisites

• Ygra, Eater of All on the battlefield
• Cauldron Familiar in the graveyard
• Altar of Dementia on the battlefield
• Skeleton Crew 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 Skeleton Crew trigger
5. Resolve the Skeleton Crew 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 Altar of Dementia by sacrificing Cauldron Familiar
8. When Cauldron Familiar dies, Ygra triggers, putting two +1/+1 counters on it
9. Resolve the Altar of Dementia ability
10. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite mill
• Infinite self-mill
• Infinite lifegain triggers
• Infinite lifegain
• Infinite lifeloss
• Infinite +1/+1 counters on a creature