Danitha, Benalia's Hope, Yahenni, Undying Partisan, and Gift of Immortality

Prerequisites

• Danitha, Benalia's Hope on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Gift of Immortality on the battlefield
• Gift of Immortality attached to Danitha

Steps

1. Activate Yahenni by sacrificing Danitha
2. When Danitha dies, Gift of Immortality triggers, returning Danitha from your graveyard to the battlefield tapped
3. When Danitha enters the battlefield, it triggers, returning Gift of Immortality 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