Within Yun Ling Mountain Range, each peak had been arranged a tactical formation and the stone tablet was the core to controlling the formations. Combining every formation of each peak would form a super formation. From Immortal Yangyu's words, this super formation could even release the power of the Supreme Realm. This was the reason why Yun Ling Academy was a formidable first-class force.
In the Land of Central Region, a half step to the Supreme Realm was the highest level of cultivation. However, no cultivators at a half step to the Supreme Realm would be able to break the tactical formation with the power of Supreme Realm, unless they could break it from the inside. This super formation was a secret and only the dean of an academy would know. This was also one of the reasons why the sky-level forces did not die out during the Battle of Gods and Demons.
