Liquimetal Coating + Pemmin's Aura + Steelswarm Operator

U identity

Commander legal

The 3 combo pieces

• Liquimetal Coating
• Pemmin's Aura
• Steelswarm Operator

How to execute it

1. Activate Liquimetal Coating by tapping it, causing Pemmin's Aura to become an artifact.
2. Activate Steelswarm Operator's second ability by tapping it, adding {U}{U} that can only be spent to activate abilities of artifacts.
3. Activate Pemmin's Aura by paying {U}, untapping Steelswarm Operator.
4. Repeat from step 2.

What the combo produces

• Infinite blue mana that can only be spent to activate abilities of artifacts
• Infinite blue mana that can only be spent to cast artifact spells