Just as they were lost in this wondrous sight, a massive stone door appeared ahead. The door was covered in intricate runes that intertwined to form a mysterious pattern. Lin Yu approached the door, observing the runes closely in an attempt to figure out how to open it.
Suddenly, the runes on the stone door flared with a brilliant light, and the illusory figure of an Old Man appeared before them. The Old Man was dressed in a white robe, with white hair and a beard that reached his chest, his eyes exuding a sense of wisdom and benevolence. Looking at Lin Yu and the others, he smiled and said, "Young people, making it this way here proves you possess a certain level of strength and wisdom. Behind this stone door lie the secrets of the Spirit Rune Technique and some precious treasures, but to open it, you must answer my question. Answer correctly, and the stone door will open of its own accord; answer incorrectly, and you will be teleported out of the Spirit Rune Pagoda, losing the chance to learn the Spirit Rune Technique."
Lin Yu and the others exchanged glances and nodded in agreement. The Old Man cleared his throat and slowly said, "The core of the Spirit Rune Technique lies in the precise control of spiritual power and the clever combination of runes. So, how can one make runes unleash their maximum efficacy without consuming excessive spiritual power?"
Chapter 98