This is my first submission for the Artist Training Grounds’ week 18 theme: draw a pony in their Nightmare Night costume.
Extrapolating from how terrified Fluttershy was of Nightmare Night and the gear she broke out in Dragonshy, this is the conclusion I came to. Basically if Fluttershy had to leave her house on Nightmare Night, she would come out armoured. And… well, it would make a nice incidental costume.
This took about an hour (the pegasi always take me longer, it seems). Done with a 2H and level adjusted. I also tried adding more feathers than usual to the wings to make them fuller.