Kiora's Follower + Judge of Currents + Clever Impersonator

Kiora's Follower

Judge of Currents

Clever Impersonator

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

This elegant loop relies on Clever Impersonator entering the battlefield as a copy of Kiora's Follower, creating a mutual admiration society of mutual untappers. Because both creatures have the ability to tap and untap each other indefinitely, you can cycle between them without ever running out of fuel. Meanwhile, Judge of Currents sits quietly on your board, watching every tap and quietly rewarding your vigilance with infinite lifegain.