Cavalier of Night, Glasspool Mimic // Glasspool Shore, and Altar of Dementia

Prerequisites

• Cavalier of Night on the battlefield
• Glasspool Mimic // Glasspool Shore on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Glasspool Mimic
2. When Glasspool Mimic dies, its second ability triggers, returning itself to the battlefield as a copy of Cavalier of Night
3. When Glasspool Mimic enters the battlefield, its first ability triggers, choose not to sacrifice a creature
4. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Glasspool Mimic's power
5. Repeat

Results

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