(Mental Corruption)
This is a skill that represents mental derangement, the depth of one's trauma and the severity of
phobias. It also functions as a skill that protects one's mind from the effects of poison, curses and
magic.
However, many organizations that encourage the acquisition of this skill are connected to
underground organizations or are underground organizations themselves. In urban areas, this
skill is considered to be an illness, and specialized facilities exist to treat it.
Many individuals who possess this skill are abnormal sadists and murderers, soldiers and
adventurers who have experienced horrific battles and assassins who have become unable to
feel discomfort and guilt when killing people. However, as there are also many artists and
inventors who possessed the skill and have left behind their names and deeds in history books,
there are few cases where one is imprisoned simply for possessing the skill.