Danitha, Benalia's Hope, Fungal Fortitude, and Yahenni, Undying Partisan

Prerequisites

• Danitha, Benalia's Hope on the battlefield
• Fungal Fortitude on the battlefield
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate Yahenni 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 Yahenni, Undying Partisan ability, giving it indestructible until end of turn
5. Repeat

Results

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