The Night of the Yule Cat

From the PDF:

This is a short scenario based on the old Icelandic myth of the Yule Cat, the huge and monstrous black cat that eats children who don’t have new clothes to wear at Christmas eve.

The story takes place during the Pagan Commonwealth period of Icelandic history, before the Christian conversion in the year 1000. As the story starts, the pagan player characters are preparing to celebrate the mid-winter festival of Yule ("Jól" in Icelandic), which is described in Grettis Saga as being a time of "greatest mirth and joyance among men."