Tradewind Rider, Intruder Alarm, and Shield Sphere

Prerequisites

• Tradewind Rider on the battlefield
• Intruder Alarm on the battlefield
• Shield Sphere in hand

Steps

1. Cast Shield Sphere by paying its mana cost
2. When Shield Sphere enters the battlefield, Intruder Alarm triggers, untapping all creatures
3. Activate Tradewind Rider by tapping it, Shield Sphere and one other creature you control, returning Shield Sphere from the battlefield to your hand
4. Repeat

Results

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