Jegantha, the Wellspring, Worldheart Phoenix, Thornbite Staff, and Phyrexian Altar

Prerequisites

• Jegantha, the Wellspring on the battlefield
• Worldheart Phoenix on the battlefield
• Thornbite Staff on the battlefield
• Phyrexian Altar on the battlefield
• Thornbite Staff attached to Jegantha
• Jegantha does not have summoning sickness

Steps

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs
2. Activate Phyrexian Altar by sacrificing Worldheart Phoenix, adding one mana of any color
3. Worldheart Phoenix dies, triggering Jegantha, untapping Jegantha
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