Hallow Mutated Cursed Corpse

Hallow Mutated Cursed Corpses, more commonly known as simply Hallows are artificial cursed spirits created by modified cursed corpses powered by cores made of cursed matter. They are mass-produced by the Millenium Earl using dark factories hidden all over London.

Creation
The base of all Hallows is a cursed corpse with the appearance black skeleton. It is constructed with a cursed matter core at its center, but as a tradeoff, it can only be activated by trapping a soul inside. The Millenium Earl is capable of performing a ritual that can bring the souls of the dead back to the plane of the living. He can only do so by taking advantage of humans who are in mourning by promising to return their loved ones. The Earl uses the ritual to bring back the souls of the lost loved ones and then traps them inside the cursed corpses, transforming them into Hallows. After activation, the Hallow hides in the skin of the person in mourning who agreed to initiate the ritual with the Earl, killing them in the process.

Exorcism
Like any other type of curse, Hallows can only be destroyed using jujutsu. Doing so also releases the soul trapped inside, releasing it back into the afterlife.

Characteristics
A Hallow's mind is born from the corruption of the soul that inhabits their body. They have more base intelligence than natural cursed spirits and are capable of masquerading as normal humans while hiding in their skin. As they evolve, Hallows tend to become more bloodthirsty and act on the instinct of destroying and growing in power by doing so. All Hallows are programmed to follow the directions of the Noah Family regardless of the order.

Evolution
Hallows gradually grow in power as they cursed other beings in order to reach new heights of cursed energy. Each time a Hallow evolves, it jumps a rank in overall power.

Grade 4 Hallows: The base black-colored skeleton is normally hidden inside a human body. They have the ability to shapeshift their arms into dark blades or guns. Grade 4's are mainly spies in the field for the Earl.

Grade 3 Hallows: Large mechanical ball-shaped tanks armed with numerous guns and cannot ports. These Hallows are much more offensively based and almost all Hallows can ascend to this level after properly assimilating their human host.

Semi-Grade 2 Hallows: This is the level where Hallows develop more individuality. They gain a sense of self and take on unique shapes and sizes while retaining their nature as a curse. Hallows who evolve to this stage also develop cursed techniques, a full rank earlier than a normal cursed spirit generally does.

Grade 2 Hallows: Numerous Grade 3 Hallows who do not achieve their evolution beyond that stage can join together to transcend its raw power. This results in gigantic Hallows that all look virtually the same in the same way that Grade 3's do. In the process, they lose all potential to develop any sense of self or individuality. All giant grade 2's are big, dumb, slow monsters with tough skin and high destructive power.

Semi-Grade 1 Hallows: Semi-Grade 2 Hallows who can evolve even further can jump directly Semi-Grade 1. At this stage their power becomes ten times greater than it was. They become nine feet tall armored skeletons with incredibly powerful bodies. Despite appearing more like one another than at Semi-Grade 2, these Hallows develop their individual egos even further. Their cursed techniques evolve and become more powerful as well.

Grade 1 Hallows: Imbuing cursed matter directly into a vessel fit for possession results in the perfect Akuma. Alma was created to be a vessel for one of the Baal. Instead, his body was found and experimented on by the Earl. He was able to separate the soul from the body and implant it with a Hallow nucleus modeled after the Lala's core. Readding the soul to that body resulted in an extraordinarily powerful Akuma on par with the highest level jujutsu sorcerers.