Kiora's Follower, Judge of Currents, and Dack's Duplicate

Prerequisites

• Kiora's Follower on the battlefield
• Judge of Currents on the battlefield
• Dack's Duplicate on the battlefield
• Dack's Duplicate is a copy of Kiora's Follower
• Kiora's Follower and Dack's Duplicate 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 Dack's Duplicate
4. Activate Dack's Duplicate by tapping it
5. When Dack's Duplicate becomes tapped, Judge of Currents triggers, causing you to gain 1 life
6. Resolve Dack's Duplicate's ability from step 4, untapping Kiora's Follower
7. Repeat

Results

• Infinite lifegain
• Infinite lifegain triggers