Pattern of Rebirth, The Cauldron of Eternity, Boonweaver Giant, and Ashnod's Altar

Prerequisites

• Pattern of Rebirth on the battlefield
• The Cauldron of Eternity on the battlefield
• Boonweaver Giant on the battlefield
• Ashnod's Altar on the battlefield
• Pattern of Rebirth attached to Boonweaver Giant

Steps

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

Results

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