400 years ago, a young noblewoman who once wanted nothing more than to be a proud knight for her country was cursed, tortured, and turned into a literal sword. Bound into the form of a magic sword, she was forced to kill for the sake of emperors, generation after generation, and upon begging God for mercy, she found herself once more in her younger body before she was trapped, before her life was ruined. This isn't just a tale of time travel or romance, it's a tale of revenge. It's a story about a strong, independent woman finding her place in life after she hardly remembers what it's like to be human. Looking at her old life with entirely new, jaded eyes and forging her own path differently this time around.
This is a world of magic and faeries. This is also a world of violent death and assassins.
Definitely, definitely would recommend it, but not if you're just looking for a cutesy romance. Summary does it little justice.
The biggest failing of this manhwa is that while the main characters are OP, all the supporting characters are idiots. They're either aggressive and illogical for no reason (just long enough for the main character to 'shine' by putting them in their place) or just naive and foolish (also to emphasize how 'great' the main character is for manipulating them.) The love interest isn't, but that's specifically because he's written to 'look good' as well. (Jack of All Trades, but also Master of All Trades which is not a real thing... no guy is that perfect.) A good writer doesn't have to rely on making everybody in the background stupid to make their main characters look better, but it could be worse. The main female character actually is good, I've read other manga/manhwa/manhua in which the main character was an actual idiot, but everyone else was a thumb-sucking imbicile that only existed to say 'wow, wow, you're so smart' to the main character. This isn't that bad. But it is blatantly obvious what they did with that.
That said, I still totally love this, definitely read it yourself :)