It was nothing more than a Peak-Level Earth Grade, Energy Condensation Cultivation Manual. In a few months or years, it would turn obsolete for him but he couldn't help but gulp in the presence of it.
"A Dual Cultivation Manual..." Davis muttered as he read the name of the manual.
Yin-Yang Merit Sutra...
In the Second Layer, there were Earth Grade Dual Cultivation Manuals but all of them were only useful for plucking cultivation, not for cultivating together.
As for the latter, only a few Mortal Grade Manuals were found giving out that method.
Unfortunately, this made dual cultivation seem evil in the eyes of people of the Grand Sea Continent, which made it not suitable for development.
This was why he didn't see any people who dual cultivated in the Grand Sea Continent.