Kiora's Follower, Judge of Currents, and Spark Double

Prerequisites

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

Results

• Infinite lifegain
• Infinite lifegain triggers