Advent prompt Day 24 - With Apologies to St Nick

[archaeologist_d]

Title: With Apologies to St. Nick
Author: archaeologist_d 
Advent prompt: Day 24 - T’was the (k)night before Christmas
Word count: 1590
Rating: G
Genre: crack humour
Warning: spoilers up through 3.13,  death of a character (not a major one)
Characters: Merlin, Arthur, other
Summary:  Twas the night before Christmas. What could possibly go wrong?  
Note: Some silliness taken from the old poem  "A Visit from St. Nicholas" by Clement Clarke Moore 1823.