This has been broken into by the community of Yuan-Ti, and leads into their extensive cave system.

The one thing players will notice about the temple vault is that there is a distinct clash or architectures. The original style of the temple above is still visible in part in the vault, but it has been overlain by a very much circular architecture, with decorative swirls and similar constructs added to the walls.

The entrance to the yuan-ti caves is through a secret door that backs onto their temple. It's easy enough to detect from this side, but not so easy from the temple side. The Yuan-ti have been using the vault as a storage place of their own, as well as having taken a couple of items from it to adorn their own temple. One item, a hollowed out square slab of stone servers as a form of altar. Inside this alter lies the hilt of Corean's Vigil.

Players will find about 4000g in various sacks of silver and gold around the vault room. In addition they will find a light hammer +1, the remains of a suit of armour +1 (counts as half plate), a couple of standard maces, a rack of 10 javelins. And a beautiful figurine of a golden miniature dragon (xarax_s_figurine), that looks almost life like in the gloom of the vault.

A search roll of 20 (or looking for it directly) will reveal a small diary written in a what appears to be a coded language; gurnath_s_diary.