Brotherhood Outcast, Altar of Dementia, and Shade's Form

Prerequisites

• Brotherhood Outcast on the battlefield
• Altar of Dementia on the battlefield
• Shade's Form on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Brotherhood Outcast
2. When Brotherhood Outcast dies, Shade's Form triggers, returning Brotherhood Outcast from your graveyard to the battlefield
3. When Brotherhood Outcast enters the battlefield, it triggers, returning Shade's Form from your graveyard to the battlefield attached to Brotherhood Outcast
4. Resolve the Altar of Dementia ability
5. Repeat

Results

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