Jegantha, the Wellspring, Worldheart Phoenix, Intruder Alarm, and Phyrexian Altar

Prerequisites

• Jegantha, the Wellspring on the battlefield
• Worldheart Phoenix on the battlefield
• Intruder Alarm on the battlefield
• Phyrexian Altar on the battlefield

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. Cast Worldheart Phoenix from your graveyard by paying
4. Worldheart Phoenix enters the battlefield, triggering Intruder Alarm, untapping all creatures
5. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite storm count
• Infinite untap of all creatures