Chapter 601: Demon Gathering Array

On the workshop's second floor, Amelia Lancaster was seated by her design desk, drawing up new airship blueprints with great focus that she did not notice Leon arriving beside her. 

Leon quietly observed the new blueprint before shifting his gaze to study the second floor, thinking it had been a while since he last came here. 

'This floor used to be filled study materials on the levitation device. But now, there is not a single trace of it. Instead, there were trains, airships, railways, and many other designs,' Leon silently mused.

"Oh? When did you get back, Leon?" Amelia Lancaster exclaimed with pleasant surprise after resting her eyes for a moment. 

She immediately stood up before speaking while inspecting Leon, "Come, let Mother-in-law have a good look at you. You have not been around much—Woah, you seem to have become much more burly."