Curator Beastie, Lesser Masticore, and Altar of Dementia

Prerequisites

• Curator Beastie on the battlefield
• Lesser Masticore on the battlefield
• Altar of Dementia on the battlefield
• Lesser Masticore does not have a -1/-1 counter on it

Steps

1. Activate Altar of Dementia by sacrificing Lesser Masticore
2. When Lesser Masticore dies, its persist ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it due to Curator Beastie
3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power
4. Repeat

Results

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