The Grimm have been the predators of Humankind and Faunus since the dawn of time. The Dust has only halted the tide, but has not pushed it back. Jaune Arc discovers his Semblance in his hour of need, and the Grimm will learn to fear their new predator. Yet, he must overcome the madness within his Semblance, lest he become one of those he hunts... AU. Jxmultiple. Cover by Aedevel