System/Skills/Other Skills/Ruler Skills

Ruler Skills are unique skills that can only be acquired by a single person in the world at a time. There are currently 15 known Ruler Skills, with 7 being based on the seven deadly sins, 7 based on the seven heavenly virtues, and 1 miscellaneous created by D when Kumoko was disappointed that Appraisal didn't evolve to a new skill.

Upon acquiring any Ruler Skill, the owner will also be given a title to match the skill, along with two other skills that are related to the Ruler Skill, be given ruler authority, and their Taboo level will increase.

Ruler authority grants the owner access to various powers that are not commonplace in the world, such as being able to block all attempts at Appraisal.

Possessing every Ruler authority, or obtaining consent from whoever holds it, is a necessary step towards deactivating the System.