Thornbite Staff, Altar of Dementia, and Godsire

Prerequisites

• Thornbite Staff on the battlefield
• Altar of Dementia on the battlefield
• Godsire on the battlefield

Steps

1. Activate Godsire by tapping it, creating a creature token
2. Activate Altar of Dementia by sacrificing the creature token
3. When the creature token dies, Godsire triggers due to its ability granted to it by Thornbite Staff, untapping Godsire
4. Resolve the Altar of Dementia ability, causing a player to mill card(s) Repeat

Results

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