THE scene started inside a dark cave. But despite that, they could see everything inside the cave clearly. It's probably because they were seeing it in the perspective of the black dragon. There were gold coins and different treasures piled up like a small mountain inside the cave. It was almost similar to the cave at the Silent Marsh where the black dragon was sleeping.
This cave was no doubt his lair.
The dragon heard footsteps coming from outside. Every steps coincided with the sound of a bell. It sounded like someone walking towards the mouth of the cave. But the dragon paid it no mind. As if he already knew who this visitor might be.