Roxanne, Starfall Savant + Basalt Monolith + Molten Duplication

Roxanne, Starfall Savant

Basalt Monolith

Molten Duplication

How it works

1. Cast Molten Duplication by paying 1, creating a token copy of Basalt Monolith.
2. Activate the token Basalt Monolith's first ability by tapping it, adding CCC.
3. Roxanne's second ability triggers, adding C.
4. Activate the token Basalt Monolith's second ability by paying 3, untapping it.
5. Repeat from step 2.

This ingenious loop kicks off when Molten Duplication crafts a temporary copy of Basalt Monolith, leaving you with a fresh artifact ready to tap. Normally, Basalt Monolith's untap cost breaks even with the mana it produces, but Roxanne, Starfall Savant steps in with her powerful mana-doubling static ability to turn every tap into a net-positive surge. By repeatedly tapping and untapping the copied monolith, Roxanne's trigger generates an extra colorless mana on every iteration, effortlessly fueling an infinite loop of colorless mana.