Into the Great Rift

From publisher blurb:

The Great Rift sits as a tear in the very fabric of the earth. Home to monsters and outlaws, it is shunned by all but the most desperate or foolish. Recently, however, a band of brigands returned to the town of Cleftwall laden with treasures that they claimed were found in caverns in the Great Rift that were exposed by a recent earthquake. But they also gave warning that the riches were obtained at great cost, for many strange creatures lurk in those caves.

You and your companions have heard these rumors and decided to investigate. With the promise of great riches, even the dangers of the Great Rift can be overcome.