Agatha's Soul Cauldron + Deeproot Pilgrimage + Ioreth of the Healing House

U identity

Commander legal

The 3 combo pieces

• Agatha's Soul Cauldron
• Deeproot Pilgrimage
• Ioreth of the Healing House

How to execute it

1. Activate the nontoken Merfolk using Ioreth of the Healing House'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 Ioreth of the Healing House's ability by tapping it, untapping the nontoken Merfolk.
5. Repeat.

What the combo produces

• Infinite creature tokens
• Infinite ETB
• Infinite mana legendary creatures you control can produce
• Infinite untap of legendary creatures you control