At his seemingly innocent question, the world fell silent. An eternity seemed to have passed when Mary spoke with a sigh.
"Of course we can engrave the formation again, but this time using Grade Four blueprints," Mary spoke matter-of-factly.
After confirming that all of his attention was on her, she continued, "But that would increase the amount of spirit stones needed to keep the formation up and running by large amounts."
After hearing her words, David once again fell silent, and a contemplative expression appeared on his face. Today, he was no longer the ignorant youth from before but could be considered somewhat knowledgeable, so he could understand what her words implied.
Like every occupation, formations were also divided into nine grades; as one went higher up the grades, the more excellent the formation became.
The difference between Grade Three and Grade Four formations was like Heaven and Earth.
