Well travelling through the desert is fraught with many perils, dehydration being one of them...Santa did a Bear Grylls on most of the deer.
Rudolph with his shiny nose was able to light the passageways of the tomb but with his splendid antlers could not fit into the passageways.
Santa decided his only option was to try and snap off Rudolph's antlers but his foot slipped and he accidentally broke Rudolph's neck.
the horror!!!
what will things be like without rudolf?
why was santa going down there?
he could have been trying to drop off an early gift to a mummy; or trying to get a mummy out of there to give to a very well behaved kid that asked for one for christmas.
makes perfect sense. however, still a very sad story.