[The information about the Sin of Revenge will be updated according to Seth's knowledge]
[Read at the risk of spoilers]
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First Circle
[Authority of Revenge (1st Stage)] When attacked first, any retaliatory attack against the enemy who harmed the user will deal highly increased damage.
[Grudge Sense] Users instinctively sense the presence of grudges around them, identifying who in their vicinity bears hatred or resentment towards others or themselves. Able to slightly sense malice.
[Curse Proficiency] Users of the Sin of Revenge possess an innate proficiency in manipulating curses, enabling them to perform rudimentary but potent cursing rituals.
Types of Curses in First Circle:
[Curse of Incident] By sacrificing a significant amount of fresh blood (e.g., slitting the palm and letting it fill an offering bowl) and providing proof of the target's identity (such as a strand of hair or a personal belonging), the user curses the target to suffer an unexpected incident proportional to the blood offered. (Can be cast without proof of target's identity if the target is within short range)
[Curse of Madness] By sacrificing their own sanity or that of a willing victim for an entire day, along with proof of the target's identity, the user curses the target with hallucinations and madness. (Can be cast without proof of target's identity if the target is within short range)
[Curse of Disease] By sacrificing vulnerability – weakening themselves or another in all aspects (making them susceptible to fate-based attacks, physical harm, or mental corruption) – and presenting proof of the target, the user curses the target to contract a disease. (Can be cast without proof of target's identity if the target is within short range)