Chief Engineer, Ancestral Statue, and Intruder Alarm

Prerequisites

• Chief Engineer on the battlefield
• Ancestral Statue in hand
• Intruder Alarm on the battlefield
• You control at least four creatures

Steps

1. Cast Ancestral Statue by tapping four creatures you control
2. When Ancestral Statue enters the battlefield, it and Intruder Alarm trigger
3. Resolve the Intruder Alarm trigger, untapping all creatures
4. Resolve the Ancestral Statue trigger, returning it from the battlefield to your hand
5. Repeat

Results

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