Knacksaw Clique + Rex, Cyber-Hound + Steelswarm Operator

WU identity

Commander legal

The 3 combo pieces

• Knacksaw Clique
• Rex, Cyber-Hound
• Steelswarm Operator

How to execute it

1. Activate Rex using Steelswarm Operator's second ability by tapping it, adding {U}{U} that can only be spent to activate abilities of artifact sources.
2. Activate Rex using Knacksaw Clique's ability by paying {1}{U} and untapping it, exiling the top card of an opponent's library with the ability to play that card this turn.
3. Repeat.

What the combo produces

• Exile each opponent's library