[ Yuji gives a nod cause yeah, "cursed" does usually mean bad things! ] I’m not great at explaining this but cursed energy is basically from our negative emotions. Like when you feel anguish or grief?

So years back, some people learned how to manifest that "bad" energy and used it to exorcise cursed spirits hanging around our world.

Some of these cursed spirits can be crazy strong though! It can take a lot of power to exorcise really strong and bad spirits.