Pattern of Rebirth, The Cauldron of Eternity, Danitha, Benalia's Hope, and Ashnod's Altar

Prerequisites

• Pattern of Rebirth on the battlefield
• The Cauldron of Eternity on the battlefield
• Danitha, Benalia's Hope on the battlefield
• Ashnod's Altar on the battlefield
• Pattern of Rebirth attached to Danitha

Steps

1. Activate Ashnod's Altar by sacrificing Danitha, adding
2. When Danitha dies, The Cauldron of Eternity and Pattern of Rebirth trigger
3. Resolve the Cauldron of Eternity trigger, putting Danitha on the bottom of your library from your graveyard
4. Resolve the Pattern of Rebirth trigger, putting Danitha from your library onto the battlefield
5. When Danitha enters the battlefield, it triggers, returning Pattern of Rebirth from your graveyard to the battlefield attached to Danitha
6. Repeat

Results

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