Basalt Monolith + Living Brain, Mechanical Marvel + Training Grounds

U identity

Commander legal

The 3 combo pieces

• Basalt Monolith
• Living Brain, Mechanical Marvel
• Training Grounds

How to execute it

1. Cause Basalt Monolith to become a creature using Living Brain.
2. Activate Basalt Monolith's first ability by tapping it, adding {C}{C}{C}.
3. Activate Basalt Monolith's last ability by paying {2}, untapping it.
4. Repeat from step 2.

What the combo produces

• Infinite colorless mana