Ayara, Widow of the Realm // Ayara, Furnace Queen, Scourge of the Throne, and Altar of Dementia

Prerequisites

• Ayara, Widow of the Realm // Ayara, Furnace Queen on the battlefield
• Scourge of the Throne in the graveyard
• Altar of Dementia on the battlefield
• An opponent's life total is higher than or equal to your life total

Steps

1. At the beginning of your combat phase, Ayara triggers, returning Scourge of the Throne from your graveyard to the battlefield, and giving it haste until end of turn
2. Declare Scourge of the Throne as an attacker, attacking an opponent whose life total is higher than or equal to yours
3. Scourge of the Throne's dethrone ability and second abilities trigger
4. Resolve the second Scourge of the Throne trigger, causing you to untap all attacking creatures and to get an additional combat phase after this one
5. Holding priority, activate Altar of Dementia by sacrificing Scourge of the Throne, causing target player to mill cards equal to Scourge of the Throne's power
6. Resolve the second Scourge of the Throne trigger from step 3, doing nothing
7. Repeat each combat phase

Results

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