Intruder Alarm, and Speaker of the Heavens

Prerequisites

• Intruder Alarm on the battlefield
• Speaker of the Heavens on the battlefield
• undefined

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