Aside from himself, Cultivation Peak was also home to a substantial number of Guest Elders skilled in the Four Arts of Cultivation, including many of Fourth and Fifth Grade, all of whom Han Li had quietly recruited.
The vial was called the Chengdao Vial, the second treasure offered by Han Li, of Emperor Level Top Grade, and it also served as an auxiliary Emperor Armament.
Although the Chengdao Vial didn't possess much in the way of offensive or defensive power, its usefulness was indeed immense. Once one grasped it, they could mass-produce most of the pills in the world.
Simply by placing a pill inside the Chengdao Vial, the Creation Formation etched within would automatically activate, absorbing higher level spiritual energy from the depths of the void, and then produce a certain number of pills inside.
The quantity of pills the Chengdao Vial produced depended on the grade of the pill—the lower the grade, the more produced, and the higher the grade, the fewer produced.