Mesachie does not necessarily mean wicked/obscene. It can also be used to describe the black magical arts (curses, maledictions, evil spells) as practiced by a shaman, as opposed to the curative/transformative type of "good" magic. "Evil" might be closer than "wicked"; certainly "obscene" in the sense we think of obscenity, like pornography or certain curse phrases, seems like a stretch.