Deeproot Pilgrimage + Kiora's Follower + Mercurial Pretender

Deeproot Pilgrimage

Kiora's Follower

Mercurial Pretender

How it works

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