Danitha, Benalia's Hope, Ashnod's Altar, and Gift of Immortality

Prerequisites

• Danitha, Benalia's Hope on the battlefield
• Ashnod's Altar on the battlefield
• Gift of Immortality on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Danitha, adding
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. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers