He posted on fanbox all the witches that are on the castle, they're all old posts from like 3 or 4 years ago, some of them are still just 2d art, some of them have beta models like this loli called ''Cambion''. she's the last one on ''the list'' if you can consider the gif where they're all together a roadmap. All he's been saying about Cambion is that she tortures people.
Some of the witches that come next (7 or so remaining) looked not so freaky so maybe he'll stop with the scat and futa thing (not that I would want that but whatever).