The Elven Crystals (1985)

From the back cover: Battle through a monster-filled forest to a lonely well. Scale the ice-covered towers of a mountain fortress. Fight with hideous bat-winged foes. Struggle in the raging surf of a wreck bound reef. Grapple with horrors from the depths of the sea: Finally you will reach your goal, deep in a cavern beneath a haunted island: there an evil priest holds the final fragment of a thousand year old secret. What is the mystery behind the Elven Crystals? This third book in the Dragon Warriors series presents three adventure scenarios along with new monsters, magic and treasure which extend the basic rules of the game. These adventures will take you and your friends to the limits of your skill and endurance.