Night of Wallachia

Night of Wallachia (ワラキアの夜) is the thirteenth of The Twenty-seven Dead Apostle Ancestors and the ancestor of Sion Eltnam Atlasia. He is very different from other Dead Apostles, as he can not actually be said to currently exist. His nature is that of a phenomenon known as TATARI (タタリ), a recurring event that grants physical shape to the fears and rumors that circulate within a community. This phenomenon first manifested as the image of the vampire that was falsely believed to haunt the province of in Romania, Vlad the Impaler, thus granting him his title.

Background
Originally an genius alchemist from Atlas named Zepia Eltnam Oberon, (ズェピア・エルトナム・オベローン) a member of the prestigious noble family of Eltnam, for whose downfall he was responsible. During his research, the ability of the Atlas alchemists to calculate and predict the future eventually revealed to him that only destruction would be an absolute result for the world. Obsessed and driven mad by this realization, he sought to oppose an universal law known as Program No. 6 (第六法), or simply The Sixth, which was said to be the bringer of that ultimate destruction, with the intention of creating an impossible future that would escape even his calculations. He became convinced that he had to become a vampire and increase his power inorder to reach The Sixth. And inorder to become a vampire he needed to break the golden rule of Atlas, as everything created in Atlas must be kept and disposed of within the domains of the organization. He left Atlas and countinued researching outside and he transformend himself into a Dead Apostle. His metamorphosis into the Tatari, theorized and formulated as part of his research of The Sixth, was realized through a pact with Altrouge Brunestud who summoned the Crimson Moon and transformed him into the curse, casting him into a cycle by which he would continuously manifest in pre-calculated areas, the journey destined to finalize a thousand years later when the reappearance of the Crimson Moon would return him to his original form as Zepia Eltnam Oberon.

Role
In Melty Blood, Wallachia appeared within the city of Misaki and was able to manifest the fear present in several of the main characters’ hearts, creating entities such as an evil Arcueid who had succumbed to her bloodlust, a form of the bloodthirsty assassin side of Shiki and even the memory of Nrvnqsr Chaos. He was eventually destroyed when Arcueid used her Marble Phantasm to prematurely summon the Crimson Moon, stripping Wallachia of his power and giving him a definite material form, after which he was killed by Shiki and Sion Eltnam Atlasia.

Abilities
The nature of Wallachia's current existence resides in his Reality Marble, TATARI, which allows the actualization of the rumors and fears of a region into physical entities. In order to manifest himself, Wallachia requires that a certain condition be met: The closed community in which he should appear must be circulating an increased amount of Malignant Information (悪性情報), such as urban tales, fright stories, anonymous charges, unfounded assumptions, improbable evidence, and all manner of rapidly spreading but ultimately void rumors. This information is what Wallachia uses as the conduit for his power, which manifests in the form of "the worst possible fate, that which we can never stand against."

Tatari is a phenomenon and at its core there is "nothing", which is why it is called "unknown." It cannot really be said that it exists, but rather it is "present." It has no true form or a body to call its own, and can only exist by clothing itself in rumors. As isolated legends, often dealing with taboo, are spread between people, Tatari picks up a little bit of the reality to take form and bring the legend into existence. He cannot choose which form he wishes, as it is only assume the shape of what "people want". Even with possible multiple rumors happening at one time, the more concentrated one will take shape. Those without enough universality will be unavailable to him, so it makes the probability of obtaining a form he likes low. If Tatari finds the form pleasing, it will seek to destroy the original, as the definite truth can only be a obstacle to the rumor. He doesn't need the real thing, such as having the "rumored serial killer" is better than having the "incomplete Shiki Tohno" existing.

It isn't necessary for rumors to be true in order bring about an incarnation of them. While it is hard to bring about a form from rumors that are original, those with an origin become confirmed as long as even the smallest amount of information flows. Even Shiki having single thought of Akiha drinking blood and the resulting fear of her becoming a vampire is enough to "spread" and confirm the rumor and bring about the form of a maddened Akiha only seconds later. Rather than bringing about a true rumor in such a case, Wallachia refers to it as "merely presenting something that was behind a curtain."

The malignant information can be compressed into the Night on the Blood Liar, a rapidly swirling torrent of virtual information resembling a black tornado of such magnitude that is even capable of having an effect on the physical world. It allows him to suck blood in such quantities as massive as entire cities, allowing others to call him a blood drinker. Its operation and management of it is proof of his Ancestorhood, and it a is metaphor on the tragedy caused by Tatari.

Zepia Eltnam Oberon, before becoming a phenomenon, is still stated to have been a powerful Dead Apostle Ancestor, and as such still has a number of abilities of his own. According to Sion, there aren't many beings who could stand up to him other than Arcueid. Chief among those, judging solely from his moveset in Melty Blood, its remakes, and the manga adaptation, is the ability to transform his body or temporarily invoke shadows to fight for him, as well as a variety of shadow-based abilities which must be fairly common among the Dead Apostles (physical strength, sharp claws, bloody whirls). He is also able to make use of alchemy, but to what extent is unknown, as he never actually makes use of alchemical skills. Even in the manga, he limits his dealings in that field to manipulating Sion's attacks against herself, and stating he had never thought his bloodline would perfect the Ethelite so much as to be able to create images that can fight with them.

Malignant copies
One means of using advanced malignant information is in fabricating and controlling malignant copies. The behaviour of each appearance is subject to that of the model created by the circulating information, yet no matter what this becomes, its personality will invariably be twisted into that of the bloodthirsty Dead Apostle and if there is not enough rumors to take different forms, it will appear as Zepia Eltnam Oberon to perform the TATARI in selected cities (as occurred in the Italian Village where Sion, Riesbyfe and the group of knights from the Church were attacked three years before the events of Melty Blood).

Receivers
It is possible that Tatari itself will not manifest, and will instead have a person act as an antenna for its abilities.

Hologram Summer
The main focus of the Tatari in Misaki city are rumors surrounding Arcuied, Shiki, and Akiha based on "The Return of Last Year's Serial Killer."

Destruction
Because he is indeed nothing but a materialized rumour, complete destruction of his being is impossible, as no matter how many times the material forms are obliterated, the reoccurring phenomenon will ensure his reappearance. Even the power of Shiki cannot destroy him completely.