Clement, the Worrywort, Intruder Alarm, and Matterbending Mage

Prerequisites

• Clement, the Worrywort on the battlefield
• Intruder Alarm on the battlefield
• Matterbending Mage in hand

Steps

1. Activate any number of creatures you control by tapping them, adding at least enough mana to cast Matterbending Mage
2. Cast Matterbending Mage by paying its mana cost
3. When Matterbending Mage enters the battlefield, it, Clement and Intruder Alarm trigger
4. Resolve the Clement trigger, returning nothing to your hand
5. Resolve the Matterbending Mage 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 Matterbending Mage from the battlefield to your hand
11. Resolve the Intruder Alarm trigger, untapping all creatures
12. Repeat

Results

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