The Day the Sky Shattered

Publisher's blurb:

A band of adventurers delves the depths of an ancient, crypt to find that which has been lost to time, legend, and good sense.

The Day the Sky Shattered is a 4-hour adventure for a bold group of 4th-5th level heroes.

Whilst performing a rather routine adventuring task, killing or otherwise dealing with a clan of unruly kobolds, your party discovers that there's much more to the kobold's hideout than mere filth. A secret door is found, beyond which lies an unspoiled Netherese crypt. Therein, the characters discover that a powerful artifact rests here. But to get it, they'll need to leverage all their cunning, grace, and keen senses. Then, they need to run like hell.