Agatha's Soul Cauldron, Deeproot Pilgrimage, and Kiora's Follower

Prerequisites

• Agatha's Soul Cauldron on the battlefield
• Deeproot Pilgrimage on the battlefield
• Kiora's Follower in exile
• undefined

Steps

1. Activate the nontoken Merfolk using Kiora's Follower's ability by tapping it
2. Deeproot Pilgrimage triggers, creating a 1/1 Merfolk creature token
3. Resolve the Merfolk's ability, untapping the other creature
4. Activate the other creature using Kiora's Follower's ability by tapping it, untapping the nontoken Merfolk
5. Repeat

Results

• Infinite ETB
• Infinite creature tokens