Grim Monolith + Power Artifact

U identity

Commander legal

The 2 combo pieces

• Grim Monolith
• Power Artifact

What must be in place

Power Artifact attached to Grim Monolith.

How to execute it

1. Activate Grim Monolith's first ability by tapping it, adding {C}{C}{C}.
2. Activate Grim Monolith's last ability by paying {2}, untapping it.
3. Repeat.

What the combo produces

• Infinite colorless mana