NOW WRITE! SCIENCE FICTION, FANTASY AND HORROR by Laurie Lamson -- Featuring speculative fiction-writing exercises from Harlan Ellison (R), Piers Anthony, Ramsey Campbell, Jack Ketchum, screenwriters of The Twilight Zone and Star Trek: The Next Generation, and many more.
It took a while for me to find a journal that related to Fantasy Fiction but I discovered and article that is about writing science fiction. Marovich, J. (2012). One Way to Start Writing Fantasy Fiction. Retrieved December 23, 2014 from http://jasonmarovich.hubpages.com/hub/Creating-a-Fantasy-World-Getting-Started