Intruder Alarm, and Shrieking Drake

Prerequisites

• Intruder Alarm on the battlefield
• Shrieking Drake in hand
• Creatures you control can tap to produce at least

Steps

1. Activate all mana-producing creatures you control by tapping them, adding at least
2. Cast Shrieking Drake by paying
3. Shrieking Drake enters the battlefield, triggering Intruder Alarm and Shrieking Drake
4. Resolve the Intruder Alarm's trigger, untapping all creatures you control
5. Resolve the Shrieking Drake's trigger, returning it to your hand
6. Repeat

Results

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