Negative emotions such as grief and anger are the foundation of cursed energy. These emotions exist to some degree within most humans and as a result, the vast majority of human beings possess cursed energy. If this amount is higher than a certain degree, it grants the person the ability to see cursed spirits. These individuals are known as jujutsu sorcerers and they are very rare among the human race. Cursed energy leaks from the human body, accumulates, and ferments over time until a cursed sp