Hawkeye's Bow, Ioreth of the Healing House, and Forensic Researcher

Prerequisites

• Hawkeye's Bow on the battlefield
• Ioreth of the Healing House on the battlefield
• Forensic Researcher on the battlefield

Steps

1. Activate Ioreth of the Healing House by tapping it, targeting Forensic Researcher
2. If Ioreth of the Healing House has Hawkeye's Bow attached to it, Hawkeye's Bow triggers, dealing 1 damage to each opponent
3. Resolve the Ioreth of the Healing House ability, untapping Forensic Researcher
4. Activate Forensic Researcher by tapping it, targeting Ioreth of the Healing House
5. If Forensic Researcher has Hawkeye's Bow attached to it, Hawkeye's Bow triggers, dealing 1 damage to each opponent
6. Resolve the Forensic Researcher ability, untapping Ioreth of the Healing House
7. Repeat

Results

• Infinite damage