Iniquitous Karma

Iniquitous Karma (罪業宿縁, Zaigou Shukuen) is something of an abnormality manifested in one's Magical Aura upon learning their form of Devil Slayer Magic; in a sense, it's more of an ability rather than a magic — as it's constantly active and can only be used when the user's magical power is exerted. It's considered to be a form of Caster Magic and a Subspecies Magic nonetheless by mages worldwide by its expansive effects alone.

Interpretations
Note: ''Here, users are able to create their own interpretations of how their aura works using the explanation provided above, thus is the only part of the article that can be edited freely. For example, go here.

Trivia

 * As always, this was approved by Lady Jojo.
 * This is, more or less, the Devil Slayer-variant of Aura Synthesis; instead, it uses various topics related to Exorcist Mages such as Anti-Eternano and Killing Intent. Permission was granted to me by D-Dawg for allowing to create this concept.
 * The "Inner Demon" concept was based on the Gourmet Cell Demons found in the anime/manga series, Toriko.