Chapter 171 Great Void Magical Instrument Upgrade (1/3)

As Subdue Evil said, the entire Immortal Palace seal is a Taiji Hunyuan Formation complete with Yin Yang and the Five Elements, perfectly suitable for An Jing's cultivation.

This is not a matter of Heavenly Mandate's favor, but rather if one wants a Formation that is both powerful and enduring, it must either purely consist of Yin Yang, the Five Elements, or Taiji Hunyuan—with the latter being the most durable and capable of operating the longest. Hence, most of the ancient Great Formations that have survived to this day are of this type, marking it a survivor bias.

An Jing once again entered the Immortal Palace, and after eliminating the influence of the Heavenly Demon, the frost retreated, and all things revived. The Formation Patterns within the palace seemed to twinkle in succession, hazy and magnificent like a flowing galaxy.