16 cards where the lore includes “assembly-worker”

Academy Manufactor (Outlaws of Thunder Junction Commander #251)
Arcbound Prototype (Modern Horizons 2 #4)
Assembly-Worker (Masters 25 #221)
Assembly-Worker (Time Spiral Remastered Tokens #14)
Autonomous Assembler (The Brothers' War #34)
Cogwork Assembler (Double Masters #242)
Dutiful Replicator (Jumpstart 2022 #48)
Foundry Assembler (Aether Revolt #151)
Mine Worker (The Brothers' War #239)
Mishra's Factory (Dominaria Remastered #251)
Mishra's Foundry (The Brothers' War #265)
Mishra's Self-Replicator (Dominaria #223)
Power Plant Worker (The Brothers' War #241)
Self-Assembler (Masters 25 #231)
Tower Worker (The Brothers' War #255)
Urza's Factory (Time Spiral Remastered #288)

The message was clear to Sorin—time to search for something else.