Super Waffle Ryebread. :3
Haha, I was wondering why you were thinking ICVD would care about fan fiction, but, yeah, it's confusing. The Clockwork Mansion is the board for the Inverted Dungeon web site, which used to be the web site for the ICVD Forums, but there was a split. Since then the ICVD Forums has been unrelated and had its own site to go along with it (only really to serve the board, though), but who knows what's going on with it right now.
Honestly, whether your fan fiction is good or not, they probably won't care at the Clockword Mansion forums. There are very few Castlevania fans there, and most that have been there were chased off by the furries that want to rule the roost. That board merged with another board for a furry web comic, but since the latter was far more popular, that fandom basically took over. Like in the art section, they'll gush over terrible, lopsided furry art, but if you post Castlevania art or any other art of anything but furries, you'll get ignored even if you're much more talented than the others. I'm not a member over there, but this is what I've seen and learned about it over the years.