Toph, the First Metalbender + Master Transmuter + Retreat to Coralhelm + Gilded Lotus

Toph, the First Metalbender

Master Transmuter

Retreat to Coralhelm

Gilded Lotus

How it works

1. Activate Gilded Lotus by tapping it, adding .
2. Activate Master Transmuter by paying , tapping it and returning Gilded Lotus from the battlefield to your hand, putting Gilded Lotus onto the battlefield.
3. When Gilded Lotus enters, Retreat to Coralhelm triggers, as Gilded Lotus is a land due to Toph, untapping Master Transmuter.
4. Repeat.