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Inside the room, Shin was currently meditating under the special Method of 'Jade Kirin Scripture' to recover his strength.
According to Grandmaster Benn, the Meditation Method of 'Jade Kirin Scripture' was way better than his 'Four Symbol Scripture', so he suggested Shin use it during his mediation session instead of his own technique.
No matter how well-rounded the 'Four Symbol Scripture', there were still some areas that it couldn't cover. His Mentalism Method specialized in battle, rune enhancement, talisman creations, and formation formulas. This was already a lot compared to most of the Mentalism Methods around the world.
On the other hand, the 'Jade Kirin Scripture' was rather peculiar. It solely focused on calming techniques and harmonization. It didn't even have a lot of offensive methods, rather it recorded a series of Mentalism Chants that were usually used for meditation.