Ritual of the Nail

From publisher blurb:

A 5th Edition Mini-Dungeon for four to six characters of level 12

As the year comes to an end, Queen Ansalia of Ganford calls for champions to complete the Ritual of the Nail.

Performing the ritual secures the blessings of Nortia, a powerful goddess of time, fate, and chance. As the sun sets on the last day of the year, a portal opens in Nortia’s temple to a demiplane she controls.

The portal remains open until the sun rises the next day, roughly 15 hours later. Once retrieved, the divine nail will be hammered into the temple wall and Ganford is guaranteed Nortia’s protection.