Altar of Dementia, Faceless Butcher, and Angel of Indemnity

Prerequisites

• Altar of Dementia on the battlefield
• Faceless Butcher in hand
• Angel of Indemnity on the battlefield
• available

Steps

1. Cast Faceless Butcher by paying its mana cost
2. When Faceless Butcher enters, its first ability triggers, exiling Angel of Indemnity
3. Activate Altar of Dementia by sacrificing Faceless Butcher
4. When Faceless Butcher dies, its second ability triggers, returning Angel of Indemnity from exile to the battlefield
5. When Angel of Indemnity enters, it triggers, returning Faceless Butcher from your graveyard to the battlefield
6. When Faceless Butcher enters, its first ability triggers, exiling Angel of Indemnity
7. Resolve the Altar of Dementia ability
8. Repeat from step 3

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill