When Kiora's Follower becomes tapped, Judge of Currents triggers, causing you to gain 1 life.
Resolve Kiora's Follower's ability from step 1, untapping Evil Twin.
Activate Evil Twin by tapping it.
When Evil Twin becomes tapped, Judge of Currents triggers, causing you to gain 1 life.
Resolve Evil Twin's ability from step 4, untapping Kiora's Follower.
Repeat.
This clever loop relies on a mutual untapping partnership between Kiora's Follower and a cloned creature, where each activation untaps the other to keep the cycle going indefinitely. Because Evil Twin has entered the battlefield as a copy of Kiora's Follower, it shares the exact same capabilities while contributing its own tapping for the engine. Meanwhile, Judge of Currents sits quietly on the battlefield watching the board, passively triggering every single time either of your untappers becomes tapped to reward you with infinite life.