Most of the stuff lately at esuccubus.com is mythical creatures and magic fantasy with fun stories. Basically all free stuff, too, so check it out at your leisure.
Just on the front page is a sci fi male cat morph transformation fantasy with robot arms stimulating listener to completion, an alien queen file about her harvesting the listener's semen in a fun way, and a bunch of cowgirl/magic transformative and control files.
The Cum Witch content if you like futas, the bee girl if you like somewhat submissive themes. Latex Tentacles and Moonlight are good files for general supernatural/magic stimulation themes.
Anyway just check out the free stuff and ignore the rest and you'll see every monster/fantasy themed series begins with a one free file at minimum
http://esuccubus.com/all-free-files