Danitha, Benalia's Hope, Ashnod's Altar, and Shade's Form

Prerequisites

• Danitha, Benalia's Hope on the battlefield
• Ashnod's Altar on the battlefield
• Shade's Form on the battlefield
• Shade's Form attached to Danitha

Steps

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

Results

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