Bloody Mary
“The legend claims that the evil woman can be summoned by chanting “Bloody Mary” into a mirror anywhere from three to one-hundred times in a darkened room lit only by a candle. (Thirteen seems to be the most popular number of chants, appropriately so.) The bathroom is the most popular setting to test out the legend, but other dark rooms seem applicable.”
The truth is that Bloody Mary is not real, but if your five year old catches wind of this tale, he will be scared so shitless that he will refuse to sleep, cry in hysterics, and avoid the bathroom until he nearly wets himself.
Thanks for the sleepless night you bloody bitch.