Preston was pretty sure that these pills would be worth a fortune out in the market.

It was not impossible for someone to give up all their savings for one.

Besides, he witnessed with his own eyes as Philip went from the peak of the first zone to the early stage of the third zone, and it only took several pills!

The higher the level, the more difficult it was to advance.

It was a miracle that 13 pills could produce this result.

To Preston, it was an amazing experience to see such scene!

If they could produce a large number of these pills, they could groom ordinary practitioners on a large scale and develop a strong force in no time.