Toph, the First Metalbender + Magus of the Candelabra + Thousand-Year Elixir + Dictate of Karametra

Toph, the First Metalbender

Magus of the Candelabra

Thousand-Year Elixir

Dictate of Karametra

How it works

1. Activate three lands by tapping them, adding at least 3.
2. Dictate of Karametra triggers three times, adding 3.
3. Activate Magus of the Candelabra by paying 4 and tapping it, untapping the three mana-producing lands and Thousand-Year Elixir, as it's a land due to Toph.
4. Activate Thousand-Year Elixir by paying 1 and tapping it, untapping Magus of the Candelabra.
5. Repeat.