The Law-enforcement Elder had given Chu Liang a detailed account of the origin of the Secret Realm.
In Ancient Times, there was a remarkable individual who made a thorough study of the Dao of Talisman and traveled across the Nine States and Four Seas, opening the gate to Rune Avenue, establishing the Talisman Immortal Sect to pass down to future generations. He was known as the "First Talisman Heavenly Master".
In the later Talisman Immortal Sect, attaining the title of "Talisman Heavenly Master" required not only control of the sect, but, more importantly, mastering all the talismans in the world, to become the Daoist Master of Runes.
But it was incredibly difficult.
Just as becoming a Talisman Master is a thousand times harder than becoming a cultivator, mastering Rune Avenue is a hundred times more difficult than mastering other avenues.
Because it does not only require an outstanding understanding but also outstanding wisdom. Only a once-in-a-thousand-year genius can do it.