Master Transmuter, Sewer-veillance Cam, Dreamstone Hedron, and Agatha's Soul Cauldron

Prerequisites

• Master Transmuter on the battlefield
• Sewer-veillance Cam in hand
• Dreamstone Hedron on the battlefield
• Agatha's Soul Cauldron on the battlefield

Steps

1. Activate Dreamstone Hedron by tapping it, adding at least two mana which you can spend to activate Master Transmuter due to Agatha's Soul Cauldron
2. Activate Master Transmuter by paying , tapping it, and returning Dreamstone Hedron from the battlefield to your hand, putting Sewer-veillance Cam from your hand onto the battlefield
3. When Sewer-veillance Cam enters, it triggers, allowing you to untap Master Transmuter
4. Activate Master Transmuter by paying , tapping it, and returning Sewer-veillance Cam from the battlefield to your hand, putting Dreamstone Hedron from your hand onto the vattlefield
5. When Sewer-veillance Cam leaves the battlefield, it triggers, allowing you to untap Master Transmuter
6. Repeat

Results

• Infinite colorless mana