In Minos' ninth technique, Divine Seal, he had reached the 2nd grade of mastery with his advancement to the 10th stage of cultivation.
Originally, this technique could be used to seal things, seal agreements between people, replace soul contracts and summon objects and beings. In short, its uses were many. These characteristics hadn't changed much as Minos progressed in his understanding. The big change was how he could use this technique on other people.
Previously, he had been able to use the Infinity Seal to connect with the giant bones in the Spatial Kingdom so that he could absorb their energy when he cultivated anywhere. But before, he could only do that with himself.
Now, however, things had changed for him, and Minos felt that he could create seals similar to the one he used with one of the giant bones in his Spatial Kingdom so that his people could enjoy the same opportunity he had.