Danitha, Benalia's Hope, Fool's Demise, and Yahenni, Undying Partisan

Prerequisites

• Danitha, Benalia's Hope on the battlefield
• Fool's Demise on the battlefield
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate Yahenni by sacrificing Danitha When Danitha dies, Fool's Demise triggers, returning Danitha from your graveyard to the battlefield tapped
2. When Danitha enters the battlefield, it triggers, returning Fool's Demise from your graveyard to the battlefield attached to Danitha
3. Resolve the Yahenni ability
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers