C178 Usefulness of heavenly corrosion demon mine

Mu Yan was currently following Hong Ling out of the Cloud Star Pavilion when Hong Ling suddenly turned around and walked towards a heavily guarded pavilion within the Cloud Star Pavilion. Just now, he had accidentally felt a strange fluctuation, and now, with curiosity in his heart, he headed towards that forbidden area. This was a rare mineral that only a refiner would be able to sense