Kiora's Follower + Judge of Currents + Quicksilver Gargantuan

Kiora's Follower

Judge of Currents

Quicksilver Gargantuan

How it works

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 Quicksilver Gargantuan.
4. Activate Quicksilver Gargantuan by tapping it.
5. When Quicksilver Gargantuan becomes tapped, Judge of Currents triggers, causing you to gain 1 life.
6. Resolve Quicksilver Gargantuan's ability from step 4, untapping Kiora's Follower.
7. Repeat.

This clever loop uses Quicksilver Gargantuan—which enters the battlefield as a copy of Kiora's Follower, giving you a second copy of that creature's untap ability—to endlessly target each other back and forth. Because both cards are Merfolk, Judge of Currents sits passively on the board to watch the tapping happen, turning every single mutual untap into a triggered life gain event. By repeatedly tapping and untapping your two identical creatures, you can cycle through this engine as many times as you like to amass infinite life.