The last two pages of the booklet were all about speculation on the fourth section of the Breathing Technique and anticipation for it.
In the penultimate page, the annotator wrote:
Based on some detailed memories before Buddha was kidnapped, cultivating the fourth section of the Breathing Technique is extremely perilous. If successful, patterns like Red Lotus Karma Fire would appear on the face; if one failed, they would become a foolish child, babbling nonsense all day long.
Buddha had never taught the fourth section of the Breathing Technique to anyone else in the secret organization earlier precisely out of fear that everyone would turn into fools.
As for what exactly the blossoming of the Red Lotus Karma Fire on the face looked like, the annotator had never seen it, as Buddha never demonstrated it and only claimed to have succeeded himself.
This detail also matched up with the Knight's Breathing Technique.