The journal contained a drawing of the Blood Dantian, but it seemed to be more of a legendary concept within the sect. Throughout the sect's history, only two people managed to create one: the first patriarch and an unknown individual mentioned in the journal.
I was curious to learn more about the Blood Dantian, but unfortunately, the journal offered no useful information apart from the drawing. Nevertheless, it wasn't entirely useless, as the last page featured writings in an unknown language. Strangely, the symbols resembled those in the book I discovered, though they conveyed different meanings.
I spent some time studying the journal and eventually managed to decipher a few things. It turned out the language was used for Ancient Formations! If only I had some knowledge about formations, I might recognize the patterns, but my understanding was lacking.