From the publisher's blurb:
BEAST FROM THE ABYSS
Free Encounter for levels 1-4 suitable for D20 system,
Web Enhancements to the “Monster Lairs: Goblins’ Caves” by The Forge Studios.
PC’s, during the journey through the caves, find and defeat Gibbering Mouther that preaches worshipping a god of cannibalism. To their amazement from the slit in the ceiling a rain of gold starts to fall down.
Find out what could happened next.