After listening to Yang Chen's description, Ling You pondered for a moment before taking out a black stone from his storage bag.
After handing the stone to Yang Chen, Ling You explained,""Patriarch Chen, this stone is engraved with a Grade Nine Spiritual Array. It is usually used to stabilize large halls. It shouldn't be a problem to use it to stabilize the pipeline you mentioned."
"The method to use it is also very simple. You just need to place this formation in the center of the tube you mentioned."
"Squeeze it a little harder and place a few spirit stones beside the stone. The formation can be used normally."
"With this formation as the center, the hardness of the pipes within a radius of 500 meters can be comparable to refined iron."
Yang Chen fiddled with the stone and continued,"Senior Ling, how much do you have here? I'll buy them all."
When Ling You saw this, he took out dozens of these stones from his storage bag and handed them to Yang Chen.