Halloween Monster Hunter

YOUR PHONE IS THE LENS. Point it into a dark room and the lens turns the camera, the compass, the light sensor and the step counter into a hunting kit. It reads the room you are actually standing in. It will not work in a lit one, and it tells you so. WALKING IS WHAT BRINGS THEM Steps in the dark are counted off the phone's own motion sensor. Twenty paces for the first, twenty more for each one after. Stand still under the lights and nothing comes, because nothing should. THREE WEAPONS, AND EACH THING ANSWERS TO ONE OF THEM Holy salt is what kills a ghost, and you never run out of it — but it is a handful thrown by hand, and a ghost drifts. Holy water reaches any distance. It burns, the thing screams and stops where it stands, and for five seconds it is open — a stake into that window goes twice as deep. The flask holds three throws, and holy water can never finish a vampire. The stake…