Kiora's Follower + Judge of Currents + Progenitor Mimic

Kiora's Follower

Judge of Currents

Progenitor Mimic

How it works

1. Activate Kiora's Follower by tapping it.
2. When Kiora's Follower becomes tapped, Judge of Currents triggers, causing you to gain 1 life.
3. Resolve Kiora's Follower's ability from step 1, untapping Progenitor Mimic.
4. Activate Progenitor Mimic by tapping it.
5. When Progenitor Mimic becomes tapped, Judge of Currents triggers, causing you to gain 1 life.
6. Resolve Progenitor Mimic's ability from step 4, untapping Kiora's Follower.
7. Repeat.

This elegant loop relies on a mutual untap dance between Kiora's Follower and a copied Progenitor Mimic, which must be cast or cloned as a Merfolk to keep the engine running. As they alternately tap to untap one another, the presence of Judge of Currents quietly watches the Merfolk tap away, triggering a steady stream of infinite life. Progenitor Mimic's intrinsic token-generating upkeep ability also ensures you'll naturally flood the board with even more copies of itself if the game goes long, making this a resilient and thematic life-gaining engine.