Danitha, Benalia's Hope, Yahenni, Undying Partisan, and Shade's Form

Prerequisites

• Danitha, Benalia's Hope on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Shade's Form on the battlefield
• Shade's Form attached to Danitha

Steps

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

Results

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