Suncleanser, Luminous Broodmoth, and Altar of Dementia

Prerequisites

• Suncleanser on the battlefield
• Luminous Broodmoth on the battlefield
• Altar of Dementia on the battlefield
• Suncleanser does not have flying

Steps

1. Activate Altar of Dementia by sacrificing Suncleanser
2. Suncleanser dies, triggering Luminous Broodmoth, returning Suncleanser from your graveyard to the battlefield with a flying counter on it
3. Suncleanser enters the battlefield, removing the flying counter from itself
4. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Suncleaner's power
5. Repeat

Results

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