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 Oblivion." If the attendant stares at you and swallows audibly, follow him to a room deep within the building, far deeper than you thought possible. The attendant will open the door and give you a fearful look. If you are brave, enter the room. If you are craven, flee now.
Inside the room, there is only a chair. Sit down in it. If at any time you begin to feel fear, get up and leave. You are still free to escape. If you choose to stay, you must sit and wait until the lights in the room flicker. Do not stand. Do not get up. If you are not sitting down when the lights flicker, then you will plummet into the void between worlds, a meal for its grotesque denizens.
When the lights flicker, you must shut your eyes immediately. Gazing upon the void will destroy your mind. Only when you hear a man clear his throat may you open your eyes. You will be in a dark dungeon, bound to the chair by a web of ebony chains. Surrounding you will be heads impaled upon blood-soaked pikes, and standing before you will be a man wearing an executioner's uniform. Stare him in the eyes; do not move your gaze and do not show even the slightest tinge of fear, for if you do, he will add your head to his collection.
The only thing you may speak without being beheaded is the question, "What will they bring?" The executioner will laugh an inhuman laugh, and then the impaled heads will begin to speak. They will speak of horrors, of executions, of their individual ends, but you must not move your gaze from the executioner, or you too will be speaking of your death. Eventually, he will speak of his own end, of what they brought to him. When he finishes, he will remove his cowl, revealing a skeleton's face. With a cackle, he will wave his hands, and the world will plunge into darkness.
When the light returns, you will be sitting peacefully in the lobby of the institution. In your lap will be the executioner's cowl.
That cowl is Object 34 out of 538. You have seen what they bring; will you stop them?