Before the Night

When the demon shows up before his time, all Hel breaks lose...

Krampus, from both Norse Mythology and German Folklore, decides to show up before Krampusnacht. Otherwise known as Krampus Night.
Only this time, he brings with him an army from Hel.
Of Demons.
Of Ghosts.
Of Spirits.
Of Monsters.

What does he plan to do?
And can the living stop him before the night takes over?