Dusk was gradually approaching, warm lights automatically lit up inside the lab to maintain the brightness. However, neither Huo Yuhao nor Ju Zi noticed these changes.

　　One was focused on working, another was watching on, enchanted.

　　Today's takeaways were almost overwhelming for Huo Yuhao. He had received Xuan Ziwen's guidance in soul engineering principles this morning, but these several hours of standing during the afternoon were actually even more important.

　　This was the optimal combination of theory and hands-on practice. Ju Zi was effectively giving him an exciting and magnificent practical lesson, it was especially effective because she was a form of confirmation for what Xuan Ziwen had talked about in the morning. A new door to becoming a proper soul engineer was slowly opening before Huo Yuhao.

　　Ju Zi heaved a long breath after a long time. "Oh, it's finally done." The silver-white metal piece became a square formation array. The horizontal and vertical lines on the formation array were precise and orderly, and Huo Yuhao wouldn't have believed it if you told him they were carved manually, without the help of any other tools, had he not just seen it happen in person.