Chapter 217: Chapter 16 The True Protagonist Never Looks Back at the Boss's Explosion

The Nine Heavens Yin Demon Prison Banner is an extremely formidable treasure.

However, what's even more formidable than the treasure itself are actually the three Nine Heavens Yin Demon Divine Inscriptions mingled among the countless seal scripts on the banner.

Tracing its origins, one can find the ancestral Orthodox Demon Sect Techniques from the ancient desolate era, titled "The Arcane Secrets of the Nine Heavens Yin Demon", divided into an upper and a lower volume.

The upper volume contains many profound spells and Nine Heavens Yin Demon Divine Inscriptions, and it's said that by cultivating to a profound level, one could cast aside their physical body, refine their soul into a demon, and achieve supremacy over heaven and earth, which typifies the Demon Sect's method for eternal longevity.