Worldheart Phoenix, Faeburrow Elder, Thornbite Staff, and Phyrexian Altar

Prerequisites

• Worldheart Phoenix on the battlefield
• Faeburrow Elder on the battlefield
• Thornbite Staff on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Faeburrow Elder by tapping it, adding
2. Activate Phyrexian Altar by sacrificing Worldheart Phoenix, adding one mana of any color
3. Worldheart Phoenix dies, triggering Faeburrow Elder, untapping Faeburrow Elder
4. Cast Worldheart Phoenix from your graveyard by paying
5. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count