Saver is a wonderful korean manhwa written by Lee Eun Young.
It’s about this amazingly skilled swordswoman, Lena, who gets sucked into an alternate universe after being badly injured by a bunch of hooligans. In this other world Lena learns that people are out to kill women matching her description so she takes on the persona of the male Ley, and becomes a wandering mercenary searching for a way to get back home. It’s a wonderful story of love, betrayal, epic battles and much mysteries.
You can find all of it on mangafox in fairly good quality (apart from chapter v1.ch2 & v1.ch3) but it is licensed in English so, if you like it, make sure to buy a copy!