Filigree Sages + Power Artifact + Steelswarm Operator

U identity

Commander legal

The 3 combo pieces

• Filigree Sages
• Power Artifact
• Steelswarm Operator

How to execute it

1. Activate Steelswarm Operator's second ability by tapping it, adding {U}{U} that can only be spent to activate abilities of artifacts.
2. Activate Filigree Sages by paying {U}, untapping Steelswarm Operator.
3. Repeat.

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
• Infinite mana artifacts you control can produce
• Infinite untap of artifacts you control