Oh deer!
Especially since the chopped up animal is a moose, not a deer. It's the antlers. All deer have spiky antlers, whereas moose have more spade- or spork-like antlers.
It also looks like Santa had to do three passes, to get all three blades of the windmill damaged.
I wonder what kind of sick and twisted moose-Santa murder-suicide pact this image depicts, considering moose don't fly. Were Rudolph and the other reindeer fed up with Santa's Christmas shenanigans –– working the poor reindeer nearly endlessly in some kind of anomalous time loop, with probably no treats at all –– and framed the scene as an accident?
Then again, reindeer have approximately the same brain capacity as frogs, so maybe not.
Then again again, there does seem to be one left behind on the background, to make sure the plot goes as planned. Maybe the flying magic also increased their brain capacity?
Certainly intriguing scene.