Intruder Alarm, and Speaker of the Heavens

Prerequisites

• Intruder Alarm on the battlefield
• Speaker of the Heavens on the battlefield
• Speaker of the Heavens does not have summoning sickness
• Your life total is at least seven greater than your starting life total
• It is your turn

Steps

1. Activate Speaker of the Heavens by tapping it, creating a 4/4 Angel creature token with flying
2. The Angel enters the battlefield, triggering Intruder Alarm, untapping all creatures
3. Repeat

Results

• Infinite creature tokens
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite untap of all creatures