Danitha, Benalia's Hope, Fool's Demise, and Ashnod's Altar

Prerequisites

• Danitha, Benalia's Hope on the battlefield
• Fool's Demise on the battlefield
• Ashnod's Altar on the battlefield
• Fool's Demise attached to Danitha

Steps

1. Activate Ashnod's Altar by sacrificing Danitha, adding
2. Danitha dies, triggering Fool's Demise's first and second abilities
3. Resolve the second Fool's Demise trigger, returning Fool's Demise from your graveyard to your hand
4. Resolve the first Fool's Demise trigger, returning Danitha from your graveyard to the battlefield
5. Danitha enters the battlefield, putting Gift of Immortality from your hand onto the battlefield attached to Danitha
6. Repeat

Results

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