In any city, in any country, go to any mental institution or halfway house in you can get yourself to. When you reach the front desk, ask to visit someone who calls himself "The Holder of Fear". If the time is right, the attendant will lead you to a closet with no floor. With a malicious grin, the worker will shove you into the hole and close the door.
As you fall through the abyss, you cannot feel any fear. If you do, you will immediately hit the spike-ridden bottom of the pit and meet a gruesome death. If you remain resolute, your fall will eventually slow and stop, leaving you in a room soaked in darkness. Into the darkness, you must speak only one thing: "What is their weapon?"
Immediately the room will be illuminated. Surrounding you will be everything that you fear, and in the center will be a creature who will take the appearance of your greatest fear. Not even once can you flinch or shrink away from this creature, or it will dismember you in the most painful way possible.
You must stare at your greatest fear while it tells you its story in excruciating detail. It will tell you of all the fears in the world, from the tiniest to the greatest, in all of their horribleness. When it is finished, the creature will ask what you fear. Now you must confess all of your fears to the creature, without looking around the room. If you miss even one, you will be consumed by your own terror, leaving nothing but a shell remaining.
If you confess all of your fears, the creature will scream, and the scream will send you hurtling through the wall behind you. When you stop moving, you will be across from the closet you entered earlier, and in the closet will be a mirror.
That mirror is Object 35 of 583. It reflects your greatest fear, and that is their weapon.