Lef had mentioned a theory that Xia Ya had heard from someone else before.

Strictly speaking, that person wasn't exactly human—master craftsman Krikto, also the manager of the Tin Soldier's Enclosure, the sole divine servant of the Mechanical Holy Spirit, Tin Soldier, holding a status akin to Frederick's in the Church of Judgment.

At the center of the Tin Soldier's Enclosure lies a platinum disc, a device resembling an ultra-high-capacity portable hard drive, containing copies of all the knowledge from several epochs before the Tin Soldier's fall. Functionally, it's equivalent to a library of all professions (life + combat) skills, a truly complete master machine of all professions.

Xia Ya had been busy advancing the plot and charming girls along the way, paying little attention to his profession, relying on this as his foundation.