Nie Li began the refining process by placing ten demon spirits of the same growth rate into the Nightmare Demon Pot. It’d been awhile since he last refined demon spirits, but he still managed to operate it easily.
Refinery failure!
Refinery failure!
Refinery success!
Nie Li refined batch after batch and the Nightmare Demon Pot continued to produce demon spirits with higher growth rates. The more he refined, the more energy the Nightmare Demon Pot absorbed from the disintegrated demon spirits.