Jujutsu Kaisen introduced a curious new twist to cursed energy with the newest chapter of the series! Cursed Energy and the techniques that spawn from them form the central mysterious core of Gege Akutami's original manga series. We have previously learned that this negative energy morphs spirits into evil beings, and Jujutsu Sorcerers use this negative energy (or more specifically, use their own negativity) to fuel their special techniques. It's why each one is unique to each user. The newest chapter of the series has introduced a new twist to this idea for the way cursed energy is shared and connected.