Omentide

From the description: Countless decades ago, the great Demon Koyn’nach wandered the land in search of power. A malevolent being of trickery and deceit, it would draw mortals into its influence by granting them gifts, highly-prized egg-like objects; but these treasures would only be seen for one fateful week during the year; the Omentide. An egg hunt riddled with danger and reward!