Hawkeye's Bow, Kelpie Guide, and Forensic Researcher

Prerequisites

• Hawkeye's Bow on the battlefield
• Kelpie Guide on the battlefield
• Forensic Researcher on the battlefield

Steps

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

Results

• Infinite damage