Xu Hei planted the formation flags in all directions, setting up a small formation. Then, he took out the artifact refining furnace.

Unlike a pill furnace, the artifact refining furnace only required the infusion of True Qi to continuously increase its temperature. As long as the temperature was high enough, even the toughest materials could be melted.

With a thought, Xu Hei sent the ancient pill furnace into the refining furnace and began infusing it with True Qi.

"Boom!"