"Actually, it's just a self-destruct crystal, but it has a special design that prevents magic power backlash," Fang Hong answered; "It's not very costly. The additional production cost mainly comes from the self-destruct crystal, which you can be assured of."
Sophie then dropped her playful demeanor. Most people think the Grand Guild is financially robust, but few understand that the Grand Guild is extremely sensitive to costs, especially for consumables. In wars involving guilds of this scale, costs are calculated by the thousands; even a slight fluctuation in individual costs can total astronomical numbers in the end.
The fact that the other party specifically mentioned this indicates a considerable understanding of the Grand Guild's operations. More importantly, his mention suggests he plans to offer design schematics rather than finished products, as costs wouldn't be their concern if it were finished products.
