A Grade 4 curse is the lowest level of threat among cursed spirits. They are generally weak, unintelligent, and easily defeated by even novice sorcerers. Grade 4 curses possess a minimal amount of cursed energy. Their attacks are typically weak and easily blocked or dodged by sorcerers with even basic training. Their abilities are usually basic and straightforward, often involving simple physical attacks or minor manifestations of cursed energy. They rarely possess complex or unique cursed techniques. They pose a minimal threat to humans, especially those who are aware of curses and can take basic precautions. They are more of a nuisance than a serious danger. Grade 4 curses are the most frequently encountered type of cursed spirit. They are often the result of minor negative emotions or localized negative energy.

Grade 3 cursed spirits are a step up from Grade 4 and represent a more significant threat, though they are still considered relatively weak compared to higher-grade curses. They require the attention of trained sorcerers but are generally manageable for those at the Grade 3 level or above. Grade 3 curses possess a noticeable amount of cursed energy. Their attacks are stronger than those of Grade 4 curses and can pose a threat to untrained individuals or those with limited cursed energy. They might exhibit some basic cunning or strategy, though they are still not particularly intelligent. They might be able to coordinate simple attacks or exploit weaknesses in their opponents. Their abilities can be more diverse than those of Grade 4 curses. They might possess simple cursed techniques or have some unique physical attributes that make them more challenging to deal with. These techniques are usually straightforward, though. Grade 3 curses can be a threat to humans, especially those unaware of curses. They can cause injuries or even fatalities if left unchecked. They are more than just a nuisance.

Grade 2 cursed spirits are a significant step up in threat level from Grade 3. They possess more power, cunning, and often unique abilities that make them a serious challenge for even skilled sorcerers. Grade 2 curses have a considerable amount of cursed energy. Their attacks are significantly stronger and can easily overwhelm untrained individuals or lower-grade sorcerers. They often display a good level of intelligence and cunning. They can strategize, adapt to their opponent's tactics, and may even be able to speak and communicate. Grade 2 curses can possess a wide range of abilities, including more complex cursed techniques. These techniques can be quite dangerous and require careful planning and execution to counter. They pose a real threat to humans and can cause significant damage and casualties if left unchecked. They are not easily dealt with and require the attention of skilled sorcerers. Exorcising Grade 2 curses typically requires the efforts of Grade 2 sorcerers or higher. They are not something that lower-grade sorcerers can reliably handle alone.

Grade 1 cursed spirits are formidable opponents, posing a significant threat to even experienced sorcerers. They possess considerable power, cunning, and often unique abilities that make them a serious challenge. Grade 1 curses possess a vast amount of cursed energy. Their attacks are extremely powerful and can easily overwhelm lower-grade sorcerers. Even Grade 2 sorcerers would struggle against them. They are highly intelligent and cunning, often capable of complex strategies and adapting to their opponent's tactics. They might be able to speak, communicate, and even manipulate others. Grade 1 curses often possess complex and dangerous cursed techniques. These techniques can be incredibly difficult to counter and require a deep understanding of cursed energy and jujutsu to overcome. They may have multiple abilities or a single, incredibly potent ability. They represent a major threat to humans and can cause widespread damage and casualties if left unchecked. They require the immediate attention of skilled sorcerers. Exorcising Grade 1 curses typically requires the efforts of Grade 1 sorcerers or higher. Even then, they can be very difficult to defeat.

Special Grade cursed spirits represent the absolute pinnacle of cursed spirit power and threat. They are incredibly rare, immensely powerful, and often possess unique abilities that set them apart from all other curses. Special Grade curses possess an almost incomprehensible amount of cursed energy. Their attacks are devastating and can easily obliterate anything in their path. Their energy levels are often so high they warp the surrounding environment. Some Special Grades exhibit extreme intelligence, rivaling or even surpassing that of humans. They can be master strategists, manipulators, and may even possess vast knowledge. Others, while perhaps not traditionally "intelligent," might possess an instinctive understanding of human psychology or a unique connection to the flow of cursed energy that makes them incredibly difficult to predict or counter. Special Grade curses often possess unique and incredibly dangerous cursed techniques. These techniques can defy conventional jujutsu principles, warp reality, or have effects that are difficult or impossible to reverse. They are often tied to fundamental fears or societal anxieties. They pose an existential threat to humanity. A single Special Grade curse can potentially cause widespread devastation and casualties on a massive scale. Containing or defeating them is often a major undertaking for the entire jujutsu community. Exorcising a Special Grade curse often requires the combined efforts of multiple Grade 1 sorcerers, or even the involvement of Special Grade sorcerers themselves. They are often beyond the capabilities of any single sorcerer.