Godsire, Thornbite Staff, and Altar of Dementia

Prerequisites

• Godsire on the battlefield
• Thornbite Staff on the battlefield
• Altar of Dementia on the battlefield
• Thornbite Staff attached to Godsire
• Godsire does not have summoning sickness

Steps

1. Activate Godsire by tapping it, creating an 8/8 Beast creature token
2. Activate Altar of Dementia by sacrificing the Beast token
3. The Beast dies, triggering Godsire, untapping Godsire
4. Resolve the Altar of Dementia ability, causing target player to mill cards equal to the Beast's power
5. Repeat

Results

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