On the stone wall, there was an intricate ancient barrier, the myriad runes on the barrier converging together, resembling the outline of a spider:
"Celestial Sound Fairy, use the detection array plate to investigate."
"Yes, Patriarch."
Celestial Sound Fairy nodded, then immediately patted her storage bag. With a flash of dawn light, a detection array plate floated in front of her as she sent techniques into the array plate.
Buzz!
The array plate suddenly shone brightly, and as the runes circulated, strands of spirit light shot towards the stone wall on the northwest side. Under the illumination of the spirit light, the stone wall faintly emitted a strange halo, as if an invisible curtain was slowly being lifted:
"Indeed, there is an invisible barrier here!"
