Disa the Restless, Altar of Dementia, Rukarumel, Biologist, and Dark Revenant

Prerequisites

• Disa the Restless on the battlefield
• Altar of Dementia on the battlefield
• Rukarumel, Biologist on the battlefield
• Dark Revenant on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Dark Revenant
2. When Dark Revenant dies, it triggers, putting itself from your graveyard onto the top of your library
3. Resolve the Altar of Dementia ability, causing you to mill cards equal to Dark Revenant's power, which will cause you to mill Dark Revenant
4. As Dark Revenant is a Lhurgoyf due to Rukarumel, Disa's first ability triggers, returning Dark Revenant from your graveyard to the battlefield
5. Repeat

Results

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