Kiora's Follower, Judge of Currents, and Hulking Metamorph

Prerequisites

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

Results

• Infinite lifegain
• Infinite lifegain triggers