It would look like some sort of forge, patrolled by many sword wielding enemies. As you get closer and closer to the end of the vault, you will see more enemies wielding doubleswords, with a few even wielding tripleswords. When you reach the end, you will face a powerful enemy in a bloodstained chamber littered with skulls and swords. This enemy can be a crazed knight, blacksmith, or Rupert, and will be wielding a very powerful unrand, that is basically the main reward from the vault.
I don't have any ideas as to what it could be named, and I don't have the game knowledge to give it reasonable stats, but I think its description would go something like this:
- Code:
Upon closer inspection, this massive blade turns out to be a myriad of smaller blades, all razor sharp, perfectly angled, and humming with the tempered ferocity of the countless enchantments woven into its steel.