Cursed Energy (呪じゅ力りょく Juryoku?) is a power source aligned with negative emotions used by sorcerers and curses to fuel their jujutsu. Cursed energy is born from negative emotions such as grief and anger. These negative feelings are common in human society so almost everyone possesses cursed energy. If this amount is higher than a certain degree, it grants the person the ability to see curses, which is very rare among the human race.