Thread:Perchan/@comment-25402543-20160131171603/@comment-25402543-20160131232508

Astral Curse but in the form of Shinigami Auxiliary Magic. The only difference would be it  would focus a little more on supplmentary spells and abilities (making contracts, banishing spirits, Onmyōdō, etc). The character in question would be training the user of the Astral Curse, which explains their slight resemblance.