Color Identity: U

Initial Card State
- Kelpie Guide in exile.
- Agatha's Soul Cauldron and Deeproot Pilgrimage on the battlefield.
Easy Prerequisites
- You control a nontoken Merfolk and at least one additional creature that each have a +1/+1 counter on them.
- Kelpie Guide exiled by Agatha's Soul Cauldron.
Steps
- Activate the nontoken Merfolk using Kelpie Guide's ability by tapping it.
- Deeproot Pilgrimage triggers, creating a 1/1 Merfolk creature token.
- Resolve the Merfolk's ability, untapping the other creature.
- Activate the other creature using Kelpie Guide's ability by tapping it, untapping the nontoken Merfolk.
- Repeat.
Results
- Infinite ETB.
- Infinite creature tokens.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).