Deeproot Pilgrimage + Mercurial Pretender + Forensic Researcher

Deeproot Pilgrimage

Mercurial Pretender

Forensic Researcher

How it works

1. Activate Forensic Researcher by tapping it, targeting Mercurial Pretender.
2. Deeproot Pilgrimage triggers, creating a 1/1 Merfolk creature token.
3. Resolve the Forensic Researcher ability, untapping Mercurial Pretender.
4. Activate Mercurial Pretender by tapping it, targeting Forensic Researcher.
5. Deeproot Pilgrimage triggers, creating a 1/1 Merfolk creature token.
6. Resolve the Mercurial Pretender ability, untapping Forensic Researcher.
7. Repeat.