Deeproot Pilgrimage, Moritte of the Frost, and Kiora's Follower

Prerequisites

• Deeproot Pilgrimage on the battlefield
• Moritte of the Frost on the battlefield
• Kiora's Follower on the battlefield
• Moritte of the Frost on the battlefield as a copy of Kiora's Follower
• Kiora's Follower and Moritte of the Frost do not have summoning sickness

Steps

1. Activate Kiora's Follower by tapping it, targeting Moritte of the Frost
2. Deeproot Pilgrimage triggers, creating a 1/1 Merfolk creature token
3. Resolve the Kiora's Follower ability, untapping Moritte of the Frost
4. Activate Moritte of the Frost by tapping it, targeting Kiora's Follower
5. Deeproot Pilgrimage triggers, creating a 1/1 Merfolk creature token
6. Resolve the Moritte of the Frost ability, untapping Kiora's Follower
7. Repeat

Results

• Infinite ETB
• Infinite creature tokens