This is, again, another overblown joke I made up after a conversation with friends. It is also, somehow, my single best CT, the one I spent the longest time making, the one I put the most effort in, and one I finally think fits the vibe of the series after my several other attempts.

充苦(Juku)

The COVID 19 disaster curse was born on April 7, 2020. It rapidly grew in size and power before being exorcised by Itadori Yuji, special grade sorcerer, and Megumi Fushiguro, head of the Zenin Clan.

Name origins: The two characters in the name use the same pronunciation as 十九, or nineteen in Japanese. The first character means "full of" and the second means "suffering", or "bitterness".

Appearance: Juku is a humanoid cursed spirit in the shape of an anthropomorphic bat. It has a compound eye in each socket. Each cell of the compound eye has its own iris and pupil, making it look like a bunch of eyes unnaturally mushed together. Its pupils are red, and when angered, or focusing its cursed energy, its pupils grow into protruding growths like enlarged versions of the spike proteins on a COVID 19 virus. When it wants to, it can grow each of the eyes to be as large as one third of the rest of their head, bulging out of their sockets for increased range of view. The rest of its body is covered in a hide of a brownish-black colour. Veins can be seen beneath the membrane of its red, leathery wings, located beneath its arms. Juko has the ability to dislocate its wide jaw that contains a long tendril-like tongue that is three feet long when fully extended. Juku can cause spike-protein-like growths to sprout from their body, particularly their back and shoulders, when exerting themselves. Their chest has two large air sacs when their pectorals should be, with six smaller sacs over its abdominal muscles. The colour of the sacs is a pinkish red like that of a lung. Despite looking fragile, the sacs are no weaker than regular muscles. It is intelligent, capable of human speech, thought, and it is bipedal. Its feet and hands are very human, with no bat claws.

Cursed Technique: Contagion Technique (伝染呪法/Densen Jujō)

Lapse: Diseased Wind (病気の風/Byōki no kaze)

Juku opens its mouth and inflates its throat sacs, spraying forth a wind imbued with their deadly cursed technique. Foes that come in contact of the wind will have their very soul corroded at by it, eating through enemies and objects while bypassing most of their natural durability. Juku's main form of attack. The ma Any creature that comes within precisely two metres/6.56 feet of the technique user can also be automatically hit by the effects of diseased wind.

Diseased Wind: Affliction (苦しみ/Kurushimi)

Diseased Wind does not just deal damage. It can also cause a debilitating effect to the enemy hit. If a sufficient amount of diseased wind is inhaled, the foe will have their cursed energy circulation clogged. Just as the coronavirus causes difficulties with air circulation, diseased wind can cause difficulties with cursed energy/magic circulation. Think of it as causing it to be less likely to hit a black flash on your opponent, as your cursed energy takes slower to get from your stomach to your fists. At its most intense stages, one may find themselves unable to use cursed techniques effectively at all, with a delay of multiple seconds. Breathe too hard, and you might find yourself at a disadvantage.

Extension: Diseased Wingbeat (病のウイングビート/Yamai no Uingbito)

Juku flaps his bat wings to push forth gusts of diseased wind with a much larger area and in larger amounts at a time. This diseased wind can linger for a longer period of time, being able to fill up rooms to cause foes to become afflicted. Juku can also passively emit diseased wind as a gas from any part of their skin, but it is a slow process.

Extension: Hundred-Day Cough/Whooping Cough (百日咳/Hyakunichizeki)

Juku uses diseased wind in a manner that emphasizes its blunt attack force, pressuring the wind with their chest sacs before releasing it in a pulse/blast rivalling the firepower of piercing blood and granite blast.

Cursed Technique: Quarantine (検疫/Ken'eki)

A separate function of Contagion Technique like Fuga, quarantine isolates a single target (including Juku) to be separate from any outside phenomena. This ability is an incredible defensive and support technique, for as long as the target is afflicted by diseased wind (Juku himself is permanently affected by diseased wind for the sake of this ability), they the quarantined cannot affect the outside world, nor can they be affected, rendering them invincible but unable to act. In this form, they can phase through walls and ceilings (but not the floor) Juku can use this to dodge attacks, but needs to turn it off to retaliate. This state can last on a separate target for as long as Juku wants up until their affliction wears off, but Juku himself can only maintain this form for fourteen consecutive seconds. After that, he will have to wait another 14 seconds to use it again. This attack is activated via a hand sign like the turning of a key in a lock, and the chant "Withdrawal, Silver Chains, Ivory and Silk, Refuge of the Exile." can extend the duration of the technique to have an infinite duration until Juku ends it, and allows them to confine the target to a specific area after activating quarantine (eg. A room).

Domain Expansion: Ward which Overflows (氾濫病棟/Hanran byōtō)

The domain is a dilapidated hospital ward, think the aesthetic of the fingerer's detention center. The floor is made of a smudged khaki brown vinyl tiling, and the walls are covered with square tiles of a sickly light-blue-green colour. The upper parts of the wall and the ceiling is a white-stained-yellow, and the drywall is peeling off with small holes in the ceiling exposing bits of pipe and wires. The fluorescent lights lining the ceiling are dim and emit a pale yellow hue. The area of the domain is like is a single room was expanded to the size of an entire hospital floor, with a low ceiling and only the four walls on the sides. The key fixture of the domain is multiple circles of hospital beds, 182 in total, positioned in a spiral around the primary fighting grounds for the people in the domain. Why 182? There's an average of 182 beds in each hospital in Japan. The room is unfurnished other wise. Every one second, a shikigami that appears identical to a person appears in one of the beds. These people take the appearance of previous victims of Juku. After 182 seconds pass and the beds are filled, all those targeted within the domain will be hit with the domain's sure hit effect. The domain's sure hit effect breaks through the domain of the sorcerer's body to congest all circulation of everything within the target's body. Cursed energy, air, and if Juku wants, blood and even brain signals all slow to a crawl, leaving foes dead or debilitated.