C548 Fighting Against a Demon King of the Eighth Rank

"Huff … Huff …"

The deafening demon roars rose one after another, resounding in the skies above the entire valley, causing one's hair to stand on end. Countless demons surged out of the demon den, and those that walked out from here were mostly devil king level expert, along with a small number of Battle Spirit Stage demons. However, once these Battle Spirit Stage demons appeared