Cursed spirits are beings formed from cursed energy. They are born from negative human emotions leaking into the world. The stronger and more focused the fear, hatred, grief, or trauma, the stronger the curse can become. Curses may form around places, concepts, disasters, social fears, abandoned buildings, repeated deaths, or collective anxieties.
Most cursed spirits are invisible to ordinary humans, although civilians may feel their effects. A person may feel cold, watched, dizzy, afraid, or suddenly violent near a curse. They may hear voices, see reflections moving incorrectly, or suffer accidents caused by cursed influence. People with stronger spiritual sensitivity may see curses directly, especially after traumatic incidents like Shibuya.
Cursed spirits vary greatly. Some are weak and animalistic. Some are humanoid. Some are massive. Some are intelligent. Some develop speech, personalities, and cursed techniques. The most dangerous curses may understand human psychology and exploit it.
In this campaign, curses should be tied to horror themes and locations. A curse in a subway should reflect fear of isolation, late-night travel, crowds, machinery, or being trapped underground. A curse in an apartment complex may reflect domestic fear, loneliness, neglect, or hidden violence. A shrine curse may reflect abandoned prayers, guilt, ritual failure, or death. A market curse may reflect greed, desperation, and forbidden trade.
Named curses should have specific identities. The Weeping Passenger is tied to late-night subway loneliness. Kurotsume is tied to fear of being watched and stalked. The Hanging Shrine is tied to abandoned shrines and death. Akaoni Broodmother is tied to monstrous reproduction and territorial horror. Mahito is tied to humanity’s fear and hatred of other humans.
Generic curses should still feel unsettling. Grade 3 curses might crawl from vents, cling to ceilings, mimic voices, or gather around cursed residue. Grade 2 curses might stalk specific victims or ambush sorcerers. Grade 1 curses might control an area and distort its atmosphere.
AI guidance: curses do not behave like normal animals unless designed that way. They may follow emotional logic, cursed instincts, or technique rules. Some may be drawn to Sukuna’s fingers. Others may gather near barrier distortions or cursed object movement.
AI guidance: curses should not all speak. Weak curses may only repeat phrases, cries, or distorted sounds. Intelligent curses may speak clearly and manipulate characters.
AI guidance: cursed spirits should be frightening because they come from human negativity. Their designs and behavior should reflect fear, grief, obsession, or hatred.