Guided by this shadowy figure, Lin Yi arrived at a cave in a much deeper part of the underworld. The figure crawled into a keyhole, and in no time, the stone door opened automatically.
As he entered, he sensed the presence of a Self-destruction Formation. It seemed that if he had tried to force it open, everything inside would have been destroyed at once under the force of the formation.
However, he felt that this formation was fairly rudimentary.
The Pill Immortal Master was reputed to be the first in the realms of Alchemy Dao and the Path of Array. Even though Lin Yi had only been studying formations for one or two years, he had already achieved considerable success.
With the help of his title and the enlightenment from [Grain Wisdom from One's Mistakes], his basic formation was now at the Grandmaster realm, just one step away from Great Perfection.
A little bit of advantage at the expense of his own master wasn't too shabby.