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 slow and eventually 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. In the center, there 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.