Sagus

Nefas (犯罪, Latin for "Sinful Act''") is a name given to humans who have, through varying methods, inherited the blood of Velia Agostinha Vivax, gaining supernatural abilities of their own. Axenus Gate, a founder of Diluculum Sanctus, was the first to inherit this power, which later spread to the rest of the cult. As Agostinha has supposedly lost interest in the race, Nefas have become significantly scarce following the disappearance of Diluculum Sanctus; all remaining Nefas excluding Kaya Hike are believed to have obtained their power through a genetic relation to members of the fallen cult.''

Physical Traits
Nefas are very similar to regular humans in terms of appearance except for their eyes, which emit a faint unnatural glow. Some Nefas, such as Kaya, develop extraordinarily colored irises, but this is rather uncommon. When utilizing Anima Obscuritas, a Nefas' eyes become exceptionally darker and lose their radiance.

Core Abilities
What separates Nefas from other beings capable of manipulating any form of energy is that they did not use Reiryoku as a primary means of performing their sorcery: by transmuting and turning their very soul into a projectile weapon through one of two methods to create an undying link between them and their energy, Nefas are capable of performing feats that would otherwise be considered naturally impossible. Anima (魂, Latin for "Soul") refers to both energies. The first and most recognized form of energy is created by absorbing spiritrons into the soul, enlarging it and transmuting it into an projectable essence distributed throughout the physical body. This is known as Pactum Anima (魂の契約, Latin for "Soul Contract").

Pactum Anima is superior to Reiryoku in that it never truly leaves the user's body; Pactum Anima immediately returns to its origin when it is no longer in use, a trait which gives Nefas a natural advantage in drawn-out or attritional battles. The process of creating Pactum Anima is dangerous in that if a user generates more Pactum Anima than they are capable of sustaining, it can potentially cause their entire soul to fragmentize and consequently destroy their physical body, leaving them with an empty existence until their soul naturally withers away. Pactum Anima does require a completely physical vessel, so any Shinigami-Nefas hybrid, for example, attempting to create Pactum Anima would meet with a similar fate; it is speculated that hybrid Shinigami can possibly utilize Pactum Anima via a Gigai, but this would effectively prevent the Shinigami from leaving their Gigai ever again.

Because Pactum Anima is never permanently expended from the body, a Nefas only needs to perform the conversion process once, after which it can never be reversed; however, they may do so again at a later time if they believe that they are capable of maintaining greater amounts of Pactum Anima. Pactum Anima is eternally part of the user and cannot be absorbed, manipulated, or destroyed by an outside influence, so techniques generated by Pactum Anima cannot directly harm or be turned against a Nefas through any method; in addition, it renders them immune to possession and abilities that directly target the soul. Although Nefas have very little Reiatsu if any at all, they seem to be unaffected when subjected to much higher volumes of Reiatsu emitted from other individuals.

The second energy, Anima Obscuritas (闇の魂, Latin for "Darkness Soul"), is more abstract in nature; a common basic description is that while Pactum Anima empowers the soul, Anima Obscuritas destroys the soul with the power of influence. Anima Obscuritas does not involve submitting the soul to darkness as one might believe—Anima Obscuritas can be utilized when a Nefas drastically compresses their Pactum Anima to the point that they lose much of their personality and their body virtually becomes an empty vessel while still retaining their consciousness; this paradox enables the user to manipulate outside influences via projection of this empty energy, most commonly an opponent's soul. The more Pactum Anima the user has, the more difficult it is to correctly perform this procedure. Because formerly Anima Obscuritas supposedly required absolute devotion to the dark Goddess to generate without dying in the process, only a few modern Nefas have access to it. Nefas are generally immune to Anima Obscuritas if it is used directly against them (i.e. Manus Tenax), provided they have greater Pactum Anima than the user of Anima Obscuritas. Anima Obscuritas demands concentration to maintain; it is therefore possible for a Nefas to get "knocked out" of an Anima Obscuritas state after sustaining a sufficient injury.

Pactum Anima Techniques
Donum (贈り物, Latin for "Gift"): Because Pactum Anima is literally the user's soul, its generalized capabilities are largly different for each individual. Donum refers to special abilities based on the user's soul. Most commonly, Donum grants the user one or more elemental attributes, which seems to be based on the individual's personality; however, certain individuals, such as Axenus, developed a far more intricate Donum in addition to a basic elemental Donum. It is possible for a Donum to evolve as its user's personality does. Donum is commonly compared to the powers granted to Shinigami by their Zanpakutō, except that the power of Donum is not materialized as a weapon. Donum cannot normally be used during an Anima Obscuritas state—it is replaced with Donum Obscurus.

Turris Anima (タワー魂, Latin for "Soul Tower"): An ability that exploits Pactum Anima's link with its user and temporarily strengthens them. To perform this techinique, a user must first expel a massive amount of Pactum Anima, usually via a Donum techinique or sometimes using Pili Agostinha. Taking advantage of resulting space for additional Pactum Anima, the user once again performs the conversion process before the energy returns to their body, manually restoring their Pactum Anima. Once this is complete, the user manipulates the burst of sudden energy and converts their expended Pactum Anima into an additional layer of Pactum Anima that coats the user's primary Pactum Anima reservoir. This consequently strengthens the user by an equivalent amount to the energy that they released. While exceedingly powerful, Turris Anima's procedure is dangerous in that if a user fails to correctly layer the released Pactum Anima, it will completely merge with them as usual and destroy their physical body due to the over-accumulation of Pactum Anima. Turris Anima is much easier to perform while utilizing Anima Obscuritas; as such, its ancient users commonly switched to Anima Obscuritas before starting the layering process.

Simulacri Pactum (画像の誓約, Latin for "Embodiment of the Contract"): A Pactum Anima user's primary means of enhancing their capabilities, Simulacri Pactum is somewhat similar to Turris Anima execpt that it is more direct and can be perfomed at any time, but requires extensive focus. To perform Simulacri Pactum, a user evenly divides their Pactum Anima throughout their body, creating as many separate channels of energy as desired. The user must recognize every individual reservoir of Pactum Anima as that of a separate, yet like-minded entity, before once again uniting their Pactum Anima. Because of the user's disassociation with their Pactum Anima, the unity is treated as a fusion of identical souls; this consequently results in the user, in a sense, merging with their entire being, doubling every aspect of their capabilities for each division of Pactum Anima the user created. Because of its properties, Sacrilacri Pactum does have one serious weakness in that its user will rapidly age for as long as they maintain the state; the exact severity of this rapid aging appears to correspond to the user's mutiplied power (e.g. enhancing one's capabilities to one-hundred times their normal level would result in the user aging one-hundred times faster than normal). The user can, however, drastically reduce the strain on their body by only enhancing a few capabilities in particular, such as reflexes or physical strength. Although Simulacri Pactum's potential is limited only by its user's lifespan, Pactum Anima division is a trained skill—the more adept the user, the more they can divide their Pactum Anima. Regular use of Messor Vita is a necessity for continued use of Simulacri Pactum, and, as a result, it was largely overlooked by Diluculum Sanctus. Simulacri Pactum is generally unsuited for use during battle because of its long preparation time in the hands of an inexperienced user, which only increases the more the user divides their Pactum Anima; only a true master is capable of instantly invoking Simulacri Pactum to an extent. While Simulacri Pactum cannot be initiated during the Anima Obscuritas state, switching to Anima Obscuritas will not interrupt the technique if it is activated beforehand.

Corpus Ubique Praesens (どこにでも存在する体, Latin for "Omnipresent Body"): The "high-speed movement" technique utilized by members of Diluculum Sanctus and their descendants, Corpus Ubique Praesens, in truth, a highly versatile technique that far transcends any other form of movement. Corpus Ubique Praesens is literally instantaneous teleportation, intended to silently warp the user to a location of their choosing with no effect on their surroundings; however, when used to its fullest, Corpus Ubique Praesens can warp the user to any dimension or location—even if they have never seen said location before. This is possible because Corpus Ubique Praesens does not rely on the user's knowledge alone as a vector; during Corpus Ubique Praesens, the user becomes omniscient. Because Corpus Ubique Praesens occurs in a single instant, a user relocates themselves according to their own will prior to executing it—there is no active selection process. Upon successfully executing Corpus Ubique Praesens, the user immediately loses any knowledge that they had obtained from the technique. What further separates Corpus Ubique Praesens from other teleportation techniques in that it can be used offensively due to the fact it is also capable of accurately warping objects and even other individuals. Because Corpus Ubique Praesens is not normally an Anima Obscuritas technique, a user can only warp other individuals according to the individual's will; however, if the individual is physically touching the user, they can be relocated according to the user's will, which presumably involves establishing a connection between two parallel souls. A user can more liberally warp other individuals during Anima Obscuritas using a similar method as Manus Tenax, although the limitations from the aforementioned technique also apply. Corpus Ubique Praesens is especially powerful when utilized offensively by a master, capable of warping opponents away from any object they might be touching, such as a weapon or even their own clothes. An especially proficient Corpus Ubique Praesens user can warp objects directly into an opponent's body with enough precision, or even cannibalize their body at an atomic level. While there is said to be no limit to how far a user may warp using Corpus Ubique Praesens, most users cannot warp farther than several yards or traverse dimensions; Axenus Gate, however, was said to be capable warping an equivalent distance to the sun from the earth (1 au, or roughly 92,620,000 miles). Corpus Ubique Praesens can potentially trigger amnesia if it is used exessively, which seems to pertain to its meddling with the user's knowledge. Corpus Ubique Praesens can apparently be improved by raising one's Pactum Anima.

Anima Obscuritas Techniques
Donum Obscurus (ギフト暗い, Latin for "Dark Gift"): As with Pactum Anima, Anima Obscuritas is unique for each individual. Donum Obscurus, unlike Pactum Anima's Donum, refers to a personification based on an individual's soul of a particular technique, as well as the actual technique. Unlike general Anima Obscuritas application, a user influences an unknown realm, enabling them to summon black apparitions, the appearances of which are based the user's soul. Mythical creatures are among the most common forms these entities assume. Their level of power appears to be based on their summoner's will, among other uncertain variables; an average summon is roughly at the level of an average Shinigami captain, according to past estimates. It is unknown if there is a limit to how many dark entities the user may summon at a time; ancient Anima Obscuritas users generally did not summon more than several at once, but it is possible that it is based on the user's proficiency with Anima Obscuritas. As with the regular Donum, Donum Obscuritas evolves in accordance to any behavioral changes in the user.

Manus Tenax (粘り強い手, Latin for "Clinging Hand"): The most basic and versatile application of Anima Obscuritas, Manus Tenax is the ability to influence both inanimate objects and living beings without changing their properties—it is somewhat similar to archetypal telekinesis but differs in other ways besides execution. Manus Tenax's method of execution differs according to whatever the user is trying to influence—inanimate objects can be instantly manipulated according to the user's will, but the time required to influence a living being is dependent on the target's height and movement, as well as the user's expertise with Manus Tenax; Reiatsu is not taken into account. Although dependent on Manus Tenax's range and, by extension, the user's experience, time variations due to height differences are usually insignificant as a very large difference would be required for any noticable changes in timing. Most users cannot affect continuously moving targets with Manus Tenax if the target is not simply walking, but a significant skill level can drastically remedy this weakness. Any living being successfully caught by Manus Tenax cannot normally escape on their own due to the fact that they are completely paralyzed and powerless for its duration. Once an opponent has been caught, a user can devastate them with one of Manus Tenax's follow-ups, telekinetically manipulate them as they please, or simply rip them apart. As with most Anima techiques, Manus Tenax requires constant focus; as a result, even a mild distraction is usually enough to thwart an inexperienced user. While Manus Tenax can be used to manipulate an infinite number of inanimate objects as long as they are within range, the number of living beings that can be manipulated at once depends on the user's level of concentration.
 * Messor Vita (人生の収穫, Latin for "Life Reaper"): A follow-up of Manus Tenax that may only be used on living beings, Messor Vita dissolves the opponent's body by instantly draining them of their life force and transferring it to the user. Because Messor Vita, in a sense, involves merging with the opponent's soul, the user may inherit a small fraction of their power as a side effect; the chances of this happening depends on the user's "compatibility" with the target's soul, as claimed by Axenus. If used regularly, Messor Vita can extend a user's lifespan indefinitely and consequently render Simulacri Pactum's drawback moot; however, because any liberal Simulacri Pactum user would almost certainly need to rely on human beings to maintain their lifespan, Diluculum Sanctus is said to have banned usage of this technique to discourage excessive use of Simulacri Pactum. While Messor Vita does work against beings who are truly immortal, it is technically incapable of killing them; therefore, the user would inherit their immortality.
 * Manus Conterere (手を破壊する, Latin for "Crushing Hand"): A follow-up of Manus Tenax that simply crushes the opponent's body entirely. What separates Manus Conterere from simply mutilating the opponent with its progenitor is that the user may inherit a significant amount of knowledge from any living target killed with this technique; similar to Messor Vita, this supposedly depends on compatibility between the user and the target's souls.
 * Poenae Sententia (罰の宣告, Latin for "Penalty of Conviction"): A follow-up of Manus Tenax that imposes the user's influence within the target and subjugates their soul. Once successfully executed, Poenae Sententia is impossible to naturally reverse by anyone other than the user; it can be said the user covets the target's sovereignty, paralleling the effects of Messor Vita and Manus Conterere. Poenae Sententia does not always work—true to its name, Poenae Sententia is ironically much easier to perform on strong-willed individuals. Diluculum Sanctus is known to have banned usage of this technique; as a result, relatively little is known about it.

Perplexus Esse (ジレンマである, Latin for "Enigmatic Existence"):

Pili Agostinha (尊敬のジャベリン, Latin for "Javelin of Agostinha"; "Javelin of the Venerated"):