Time Spiral revived the type for Urza's Factory and the Assembly-Worker. The latter was the only creature card naming the creature type in its type line until the Kaladesh block added Self-Assembler in Kaladesh as well as Cogwork Assembler and Foundry Assembler in Aether Revolt.
Assembly-Worker tokens[edit | edit source]
|Assembly-Worker||Colorless||Artifact Creature — Assembly-Worker||2/2|
named Mishra's Self-Replicator
|Colorless||Artifact Creature — Assembly-Worker||2/2||Whenever you cast a historic spell, you may pay . If you do, create a token that's a copy of Mishra's Self-Replicator. (Artifacts, legendaries, and Sagas are historic.)|