Basalt Monolith + Mechanized Production + Roxanne, Starfall Savant

GUR identity

Commander legal

The 3 combo pieces

• Basalt Monolith
• Mechanized Production
• Roxanne, Starfall Savant

How to execute it

1. At the beginning of your upkeep, Mechanized Production triggers, creating a token copy of Basalt Monolith.
2. Activate the token Basalt Monolith's first ability by tapping it, adding {C}{C}{C}.
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.

What the combo produces

• Infinite colorless mana