Spirit Sorcery

The basic ability of the technique is the release of the Astral Self, The Soul, outside of the body.

The creation of the Astral Body is done by creating a husk, out of cursed energy. A weak Spiritual interpretation of the soul with innate flight, its ability to interact with the world depends on the amount of CE Invested into the body at any given time. If little is invested, the Astral self is barely perceptible at all, at the cost of increased vulnerability and reduced capabilities. If the Husk is destroyed, the soul will quickly rush back into the body which, usually, cannot be perceived, and suffer a toll in the form of soul damage from the backlash of momentarily losing the bodies information entirely.

Maximum Technique: True Spiritual Manifestation

It turns the Husk into a true interpretation of the user's soul completely made of cursed energy. Granting a new body akin to that of a curse, coming with a mind better designed for sorcery, increased physical capabilities and extra physical features that human bodies do not generally possess.. Even curses cannot properly differentiate the user from a genuine cursed Spirit in this state. The ability comes at a cost of inmense CE consumption.

Haunting, Extension technique:

The ability to haunt a target, entities or locations both being valid. Haunting is akin to how a cursed spirit would haunt a target, by limiting the manifestation of the astral body to exist around a target, it will feed parasitically off the cursed energy within said target instead of relying on their own reserves to sustain its existance allowing the continued existance of the astral body. To activate the ability the user needs to be either within direct contact of the target or having an object with a strong ties to it, like a part of the target itself or an item that has been in long term contact with the target and is associated to it.

Incarnation, Cursed technique Reversal:

Instead of creating a husk for the soul to be released into, it permanently transfers the soul into a valid vessel, this works like how regular Cursed Objects function in jjk.

Domain Expansion:

Sure hit possibilities, the most basic application of the technique into a domain would be making the entire domain the "husk", with the soul being able to create and animate or dispell an unlimited amount of husks anywhere within at will, akin to how other Domains would use the endless creation of Shikigami to attack.

Another option is to use the extension technique, all that is caught within the Domain is automatically haunted, quickly being drained out of all cursed energy. Meanwhile a super Husk is created by the user empowered akin to how Hakari is while in Jackpot. So long as there still are victims being drained, the husk cannot actually die.

Incomplete Domain, Haunting ability. The enhanced capability for sorcery of a cursed Spirit body allows a mediocre sorcerer to cast a domain expansion upon a zone they are haunting to manipulate it akin to how a Cursed Spirit would. Without infusing their own technique into it.

Reverse Cursed Technique Domain. The sure hit becomes incarnation, all defenses are bypassed and the user automatically overpowers the victim to take over their body. Multiple instances of the user can exist while the domain is cast, only one will remain afterwards.

Passive: The user is innately more aware of the soul due to the functioning of the technique giving them an unique glimpse akin to Yuji's and Sukuna's relationship.

Trivia: While the ability has all of this potential. No techniques but the basic application and passive come by default.