Perigee Beckoner, Altar of Dementia, and Karmic Guide

Prerequisites

• Perigee Beckoner in hand
• Altar of Dementia on the battlefield
• Karmic Guide on the battlefield

Steps

1. Cast Perigee Beckoner for its warp cost by paying
2. When Perigee Beckoner enters, it triggers, targeting Karmic Guide
3. Activate Altar of Dementia by sacrificing Perigee Beckoner
4. Activate Altar of Dementia by sacrificing Karmic Guide
5. When Karmic Guide dies, it triggers, returning itself from your graveyard to the battlefield tapped
6. When Karmic Guide enters, it triggers, returning Perigee Beckoner from your graveyard to the battlefield
7. When Perigee Beckoner enters, it triggers, targeting Karmic Guide
8. Resolve the Altar of Dementia ability from step 4
9. Repeat from step 3

Results

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