A neat little adventure to slot in when you haven't had much prep time or there's a lull in the ongoing campaign, this is designed to entertain your players for an evening's play. All you need to do is have the characters in a city near a desert then sucker them into going for an ale one evening and then...
The premise is simple. Out in that handy desert there is an ancient tomb with rich pickings to be had by any willing to brave a little danger. As encouragement, the informant has a classic sob story to tell about his lifelong friend who lies at death's door and can only be saved by an artefact he believes is hidden in this tomb - everything else the characters may take for themselves. Who could resist?
Assuming the characters take the bait, er, I mean, decide to aid this worthy cause, they'll need to travel across the desert to the tomb. That bit is left to you, gloss over it or throw sand, sun and suffering at them as you please. There are plenty of resources to help you deal with desert travel if required. The tomb is, however, detailed comprehensively, as befits the focus of the adventure. It depends on how much time you have and the way in which you wish to present things - and how it all fits in with anything else that might be going on in your campaign.
The tomb itself, whilst somewhat reminiscent of something found in Ancient Egypt, is well-constructed from a fantasy point of view which an array of obstacles to keep tomb-raiders at bay. There's plenty to keep the characters occupied, without being too frustrating... at least, provided they are willing to put in some hard work to excavate the tomb properly.
Most monsters herein are relatively familiar, but there is a useful new one well suited to any formal tomb of a devotee of a cult that believes you and your possessions can pass on to an afterlife, the artefact itself (which has plenty more plot potential even after you've retrieved it), not to mention the occupant of the tomb who, shall we say, may well object to anyone having the temerity to disturb his eternal rest.
It's a neat package to use as a one-off game or a side-adventure dropped into a campaign at a suitable moment. With a bit of care and advance prepartion - such as finding reference to the artefact or encountering a situation in which it could be of use independently of a fellow in an inn enlisting the characters' aid, the adventure could be woven into your overarching plot.