Danitha, Benalia's Hope, Fungal Fortitude, and Altar of Dementia

Prerequisites

• Danitha, Benalia's Hope on the battlefield
• Fungal Fortitude on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Danitha
2. When Danitha dies, Fungal Fortitude triggers, returning Danitha from your graveyard to the battlefield tapped
3. When Danitha enters the battlefield, it triggers, returning Fungal Fortitude from your graveyard to the battlefield attached to Danitha
4. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Danitha's power
5. Repeat

Results

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