Crossover - Once Upon a Time & Arrow - Rated: M - English - Romance/Fantasy - Chapters: 15 - Words: 8,896 - Reviews: 7 - Favs: 8 - Follows: 18 - Updated: 9/9/2015 - Published: 7/5/2015 - Emma S., Granny, Oliver Q./Arrow/Green Arrow, Felicity S./Overwatch