These advanced tunneling skills, although not as powerful as those within Spirit Wind Valley, were already fast enough compared to other forces.
In addition to this, it was previously described that some declining minor forces might also possess such profound tunneling skills.
However, to obtain such profound tunneling skills from these minor forces would be quite difficult.
After all, this technique could be the greatest reliance for these small forces to rise in the future.
It would be unthinkable for them to easily hand it over to someone else.
In such circumstances, He Song had some ideas about where he could possibly find what he was looking for in the future.
He had some thoughts about it.
The advanced tunneling skills that He Song needed were rare in Spirit Wind Valley and the adjacent regions, but they were not completely non-existent.
At the large-scale auctions held by Jubao Pavilion every ten years, one could occasionally see such profound tunneling skills.
