Oathkeeper, Takeno's Daisho, Altar of Dementia, and Sokka and Suki

Prerequisites

• Oathkeeper, Takeno's Daisho on the battlefield
• Altar of Dementia on the battlefield
• Sokka and Suki on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing the creature with changeling
2. When that creature dies, Oathkeeper triggers, returning it from your graveyard to the battlefield
3. When that creature enters, Sokka and Suki triggers, allowing you to attach Oathkeeper to that creature
4. Resolve the Altar of Dementia ability
5. Repeat

Results

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