Casus Puteus

Casus Putues (, Keisu Pyutosu; Latin for "Abyss Descend", Japanese for "Extreme Hatred Manifestation of the Deepest Abyss") is one of the three known Black Arts forms created by Zetsubō Usuguraiboshi, said to be manifestation of his various negative emotions; it's part of the Megiddo Triad (, Megido Toraiado; lit. "Underworld's Three Demonic Superpowers"), a set of magics that's based on different aspects of Megiddo, the darkest region in all of the Heroic Chronicles series — heralded and feared as "the source of all known evils" by various beings. Due to this, this makes the magic one of the most dreadful of its kind overall, something its shares with its other two brethren.

Alternatively known as Curse Magic (呪い魔法, Noroi Mahō), it effectively makes use of Zetsubō's vast degree of negativity in the form of "Hexes" (呪詛, Juso), which induces various malicious effects on those unfortunate enough to become its target; it's said that each one is based on one of his negative traits and numbers in the hundreds — branding Zetsubō as a Curse Master (悪態魔術師, Akutai Majutsushi) of sorts. This is considered to be a Fighting Style, the eerie mage using it as his main method of combat and a way to carry out his innumerable atrocious acts for the sake of his modus operandi.

Trivia

 * The name of thsi article is taken from the series, 11Eyes — something the author enjoys for various reasons in lieu of its somewhat overly-gruesome and dark undertones.
 * This was originally meant to be a form of Psychesfairó̱n, but after seeing how Zeroth Nightmare Complexion exists and the name of this article is taken from a pocket dimension of the aforementioned series, sharing similar concepts in design, the author scrapped the idea — fearing that other users would see it as a crossover.
 * This is the author's interpretation of Curse Magic, something that was briefly mentioned earlier on in canon, and expanded here for personal use; it uses information on the Authorities from the anime/light novel series, Re:Zero.