In short: Hazou would not be willing to create manuals for people to learn runecrafting from, whether or not he supplies blanks to go with it.
Briefly expanding Hazou's model:
- Learning runecrafting without a teacher is suicidal.
- Learning any form of sealing without a teacher would be suicidal as well, for the simple reason that it's easier to get to the point where a sealmaster can attempt an infusion, than to get to the point where the infusion can be performed successfully.
- The reason for this is roughly that there are an infinite number of mistakes a student can make, and the student won't notice them by default.
- However, unlike sealing, a runecrafter that causes an infusion failure doesn't just die, but probably causes something unimaginably horrible in the process.
- However, the Great Seal is an exception. Whether by accident or by design, it presents such an incredibly detailed, thorough exemplar of three-dimensional sealing (throughout its entire, plateau-spanning mass) that a sufficiently skilled sealmaster could, with several months of study and access to the right materials/ninjutsu, reverse engineer runecrafting from scratch.
- Previously, this study would have been nearly impossible to conduct with the Dragons present.
- Hazou managed to download the Great Seal in the Iron Nerve, and thereby managed to compress the months of study into a couple weeks – once he had the right materials of course.
Written materials, blanks, and burned out runes cannot qualify as sufficient material to learn runecrafting, in the sense of producing a successful infusion. However, materials like this
could potentially get a sealmaster to the point of attempting a runic infusion, and that could be catastrophic. Therefore, Hazou is unwilling to make such guides.
For the particular case of Kagome learning runecrafting after Hazou's death, Kagome could likely attempt to learn it via the Great Seal.
