Squirrel Nest, Intruder Alarm, and Ioreth of the Healing House

Prerequisites

• Squirrel Nest on the battlefield
• Intruder Alarm on the battlefield
• Ioreth of the Healing House on the battlefield

Steps

1. Activate the land with Squirrel Nest attached by tapping it, creating a 1/1 Squirrel creature token
2. When the Squirrel enters, Intruder Alarm triggers, untapping all creatures
3. Activate Ioreth of the Healing House by tapping it, untapping the land with Squirrel Nest attached
4. Repeat

Results

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