All along, Leon was only responsible for proposing ideas, with all specific execution handed over to his subordinates. The construction of the Undead Factory was no exception.
As the Undead Mine smoothly began production, subsequent projects of the Undead Steel Factory and Forging Factory were fully handed over to Cecilia to assist Laksha. With no urgent matters at hand, Leon decided to thoroughly study the Star Realm speedboat and Astral Sailboat he brought back from Tunaras, as well as the Hell War Machine confiscated from Aphnas.
Operating those Githyanki vehicles requires mastering Spiritual Energy, and starting those Hell War Machines requires infusing the engine with soul coins... The power of the Hell War Machines comes from soul combustion, making it somewhat cumbersome to use. Leon hoped that after modification, they could run on ordinary fuel.