Sister Magic by Z-Afiro (Patreon)

Despite the contentious nature of their relationship, given the Lina's massive jealousy, the Mercurius sisters are close. As Lina came of age it was Luna's responsibility to teach her several things, especially about her body. Though many would consider the incestuous nature of these escapades to be appalling, as a family of adepts with an incredibly deep spirit well, these sexual exercises are necessary.

Not only is Lina being groomed to be a talented sexual being, which is a plus when marrying into noble families, she's being taught to defend against lilin which prey mages in their moments of weakness. Seduction, manipulation of lust and sex are some of the best tools lilin have to lower the guard of adepts and drain them of their quintessence. Some even devour their victims. 

Because of this many adepts are encouraged to learn defensive techniques to combat such an eventuality. But due to the hands on natura of such training, it is yet to become an acceptable part of Librarium curriculum. Mages are encouraged to practice this on their own, as in the past, odd and compromising issues began to blossom between teachers and students. Adept families are often the best way to do so and the Mercurius family is no exception. 

The art for this fantastic piece is drawn by Z-afiro over on FA. They've got a lot of adorable art and you should definitely go check them out on there page @

www.furaffinity.net/user/z-afiro/