Sequel to Groom of Eris and Son of Eris, Butterscotch and Eris are having a lovely Hearths Warming with their families. However, when Eris tells a colt that there is no such thing as Santa Hooves, a being is summoned in order to teach the good ponies of Ponyville a lesson. Will a certain colt realize his mistake in time to save Hearths Warming?

Genderbend version of Hearths Warming Chaos by Disney Fanatic 2364.

Rated T for Horror.