User with this ability either is or can transform into an Orang Minyak (Malay, "Oily Man"), a male spirit with pitch-black skin whose nocturnal attacks comprise typically of sexual assault, which is directed most commonly toward virgin women (though, any women are potentially vulnerable). Orang Minyak are said to be creatures which already exist (which may be summoned and controlled by shamans), though men can also be cursed to turn into an Orang Minyak if they attempt to win the love of a woman with magic.