For cultivation techniques of this level, the last chapters were usually of the kind that could only be comprehended directly, and not imparted. The cultivation techniques themselves would carry the power of laws, and thus couldn't simply be copied down with pen and paper. Even if it were forcibly recorded or copied, the written words would be erased by the power of heaven and earth.
Therefore, in order to maintain their integrity, cultivation techniques of this level had special inheritance locations where the future generations could enter to understand the core part. The core part of the ❮Holy Ape Dragon Power Technique❯, for example, was located in an inheritance location in the Beast Realm.
