Hogaak, Arisen Necropolis, Caldaia Guardian, and Altar of Dementia

Prerequisites

• Hogaak, Arisen Necropolis on the battlefield
• Caldaia Guardian on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Hogaak
2. When Hogaak dies, Caldaia Guardian triggers, creating two 1/1 Human Citizen creature tokens
3. Resolve the Altar of Dementia ability, causing you to mill eight cards
4. Cast Hogaak from your graveyard by tapping the two Human Citizen tokens and exiling five cards from your graveyard
5. Repeat
6. Once you have milled your library, you may continue the loop by milling opponents instead as allowed, and/or sacrifice the Human Citizens for extra mill

Results

• Infinite self-mill
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite mill
• Near-infinite sacrifice triggers
• Near-infinite tapped creature tokens