Hawkeye's Bow + Fatestitcher + Forensic Researcher Combo

All permanents on the battlefield (Hawkeye's Bow attached to either Fatestitcher or Forensic Researcher on the battlefield and Fatestitcher and Forensic Researcher without summoning sickness on the battlefield).

Activate Fatestitcher by tapping it, targeting Forensic Researcher.

If Fatestitcher has Hawkeye's Bow attached to it, Hawkeye's Bow triggers, dealing 1 damage to each opponent.

Resolve the Fatestitcher ability, untapping Forensic Researcher.

Activate Forensic Researcher by tapping it, targeting Fatestitcher.

If Forensic Researcher has Hawkeye's Bow attached to it, Hawkeye's Bow triggers, dealing 1 damage to each opponent.

Resolve the Forensic Researcher ability, untapping Fatestitcher.

Repeat.

Infinite damage