Kiora's Follower, Judge of Currents, and Progenitor Mimic

Prerequisites

• Kiora's Follower on the battlefield
• Judge of Currents on the battlefield
• Progenitor Mimic on the battlefield
• Progenitor Mimic is a copy of Kiora's Follower
• Kiora's Follower and Progenitor Mimic do not have summoning sickness

Steps

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

Results

• Infinite lifegain
• Infinite lifegain triggers