“Obtaining the topmost degree of talent in sword arts in the world requires giving up 72 years of lifespan, which leaves you with only five more years of your life. At the same time, you will never be able to feel love, kinship, and friendship, and you’ll end up leading a lonely life until your death, unable to procreate, or to have any descendants. “From now onwards, everything related to happiness in the human world shall no longer be of your concern. Are you willing to accept this?” “Hahahaha, I’m already alone bereft of all support, my hopes dashed to pieces, shouldering only absolutely irreconcilable grudge and hatred, why would I disagree? Why would I not want it? I couldn’t ask for anything better!!” His sword sweeps across the Divine Continent for seven days and nights, moving 90,000 miles through the starry skies, unhindered. He slays saints and buddhas in Heaven, slaughters demons and devils in Hell, sweeping away all the grievances in his heart!
The mentors in the Killing Techniques Palace had rotational duties since, as Conferred Knights, they had too many tasks, and they could only take turns to do things like providing guidance on sword arts.
Usually, other than the four and a half hours in the morning and four and a half hours in the afternoon, there were no mentors on duty for the rest of the day.
Oftentimes the person on duty was not a teacher, and was instead a student.
However, the sword arts mastery of these students was not to be underestimated either. They had all reached the maximum level in the sword technique that they were mentoring. They could even have started practicing the sword techniques from the later stages of the Killing Techniques Palace and had either completed or were trying to complete the skills synthesis.
Of course, even after they have completed the synthesis, they would still know the essence to the Thunderbolt Sword Technique and could still perform it.