Clement, the Worrywort, Intruder Alarm, and Nurturing Pixie

Prerequisites

• Clement, the Worrywort on the battlefield
• Intruder Alarm on the battlefield
• Nurturing Pixie in hand

Steps

1. Activate any number of creatures you control by tapping them, adding at least enough mana to cast Nurturing Pixie
2. Cast Nurturing Pixie by paying its mana cost
3. When Nurturing Pixie enters the battlefield, it, Clement and Intruder Alarm trigger
4. Resolve the Clement trigger, returning nothing to your hand
5. Resolve the Nurturing Pixie trigger, returning the other creature with greater mana value from the battlefield to your hand
6. Resolve the Intruder Alarm trigger, untapping all creatures
7. Activate any number of creatures you control by tapping them, adding at least enough mana to cast the creature returned to your hand
8. Cast the creature by paying its mana cost
9. When the creature enters the battlefield, Clement and Intruder Alarm trigger
10. Resolve the Clement trigger, returning Nurturing Pixie from the battlefield to your hand
11. Resolve the Intruder Alarm trigger, untapping all creatures
12. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite storm count
• Infinite mana creatures you control can produce
• Infinite untap of all creatures