The Hall Of Web

You notice one hallway that's entrance and walls are completely covered in spider webs. You decide that it could be a good way to go as they could just be cobwebs, indicating that nothing has been down this one for a while.

You take a few steps inside and tiptoe your way down. The hanging webs and stray cords of silk create haunting shadows in the mushroom light. They dance about the walls as the darkness swallows the way back. You feel like your being watched, but shack it off as dungeon jitters and press on. You pass several small silk sacks containing random objects and small creatures siphoned of their blood. You finally come across a large cylinder shaped room. A rounded cliff circles a deep hole filled with large amounts of spider webs hanging over a seemingly endless abiss. But something is in the web. Something moving in the center, shaking the strings with every motion. But what is it?