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

Prerequisites

• Rex, Cyber-Hound on the battlefield
• Knacksaw Clique in exile
• Steelswarm Operator in exile

Steps

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

Results

• Exile each opponent's library