The work was far from simple. Lex would have loved to summon hundreds if not thousands of workers from the Inn to expedite the work for him, but that wouldn't work. This was because crafting the foundation of the forge, even a temporary forge, not only required immense power, it also required precise control, the likes of which hardly anyone else had.
Among the entire staff of the Midnight Inn, besides Lex, only Anita had sufficient control - from controlling the horde of beautiful undead she controlled. But Anita was increasingly taking time off as she was getting closer and closer to her delivery date. Although the expected date was still a couple decades away, these things were unpredictable. A few decades to her would be like a few days off to a mortal woman. It was completely normal to be early, just as it was completely normal to be late.