Roxanne, Starfall Savant + Basalt Monolith + Court of Vantress

Roxanne, Starfall Savant

Basalt Monolith

Court of Vantress

How it works

1. At the beginning of your upkeep, Court of Vantress triggers, 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.