Heh.

[Suddenly this shady character is just kind of standing nearby, talking to himself?]

Well, child of man? Are you going to go in there? Of course, the last one who entered a portal to the vestibule saw such visions that they say his mind was destroyed. He spent the remainder of his life a wanderer, lamenting his fate in tongues no mortal has spoken in a thousand years.

So even if you're feeling bold today, you might want to give your last confessions!