Yes-ish~
IDK, you have to quantify what counts as horror. The Baby Eöl Fic is my very slowly written foray into the closest thing to straight horror. It’s easier for me to pepper in horror elements in the Tol-en-Gaurhoth and Angband settings. But pure downer ending horror dark fic? Hard for me to say never, but …it’s a thing that the Old Kingdom series and other fantasy that do have horror elements is very influential for me- but I almost never watch any horror or slasher or suspense films or tv shows (I watched the first few episodes of Fear the Walking Dead, but that was a big anomaly for me, and I don’t watch Insidious or Conjuring or even older horror movies. And the only Stephen King novel I ever read was The Green Mile.) The amount of horror in ASoIaF is about it. Or the sort of graphic violence ‘Hammer Horror’ of the Netflix animated Castlevania. So the Kingfisher in a Cage has a tidbit of the gore and psychological horror, or Wall the Heart. But it’s not my committed genre, so I’m not sure if my efforts would satisfy a craving for horror.
Smut… confessional time. I’m more comfortable with my writing abilities to fake a fight scene and write violence than fake a sex scene. Now are there three contenders for ‘I will write you two and definitely have to pull the AO3 rating up to mature?’ Yes. I just don’t know which will come first: Faron and Faelindis post healing, Ingwë and Ravennë’s first time and it’s cultural mandated exhibitionism, or the Nienna visits Melkor when he’s chained in Mandos for I know you know I know you are just using me for sex and how do I go about writing sensory deprivation-related smut when they’re both Ainur and thus bodies are sort of negligible anyway.