The Black Citadel

You sit down and rest a while (add 1 mana point). It's then you notice another final stone figure facing you, behind the last pillar in the room. It's a woman with long hair with a large bow half drawn. She has the most bewildered look on her face, her last outward expression before she met instant death and was turned to stone by the Medusa's powerful gaze.

Your fingers brush against something on the right armrest of the throne. You realize it's a keyhole of some sort, but quite large and diamond shaped. You wonder what you could use to open such a lock. Do you have a silver dagger and wish to use it?