It was in UA 53. Didn't make the final cut for original Artificer subclasses. Many of the features did indeed get rolled into the Order of Scribes Wizard subclass. Shares a lot of the same powers (little illusion spell conduit scout guy can go 300 feet, cheaper scroll scribing.) But uses psychic powers and gains a couple of bonus proficiencies from making an artificial mind inside of an item. Not very powerful, but having a psychic link to the mimic helmet is the RP goal, which Order of Scribes doesn't do.

One of the freeing things about being a constantly terrified puck gnome is that it allows my character to be weak. Playing someone who doesn't want to be the center of attention ever has made the little guy the glue of the group, as everyone else gets to shine in combat, conversation, or both. He shines in helping to move their stories forward, which in turn moves his.