'Twas the Night Before Crystal Fest

From publisher blurb: Alliances are forged and a secret is revealed on the eve of an ancient celebration! The heroes intercept a desperate cry for help originating from the extreme western corner of the Ice Kingdom of Naquk—a vast ice-sheet known as the Ku’ar. There they discover a group of ill-equipped giants who have been cut off from their village by an avalanche, leaving their children and the infirm on their own. The heroes are tasked with finding a way into the isolated valley and defending the village against voracious sea creatures and mysterious visitors who arrive in the night!