Melira's Keepers, Luminous Broodmoth, and Altar of Dementia

Prerequisites

• Melira's Keepers on the battlefield
• Luminous Broodmoth on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Melira's Keepers
2. Melira's Keepers dies, triggering Luminous Broodmoth, returning Melira's Keepers from your graveyard to the battlefield without a flying counter on it
3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Melira's Keepers' power
4. Repeat

Results

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