Slaughter Queen Reborn

She was the legendary agent, the nightmare of terrorists. But after she woke up from her death, she realized that the God has granted her a new life in the ancient time. She was reborn into a weak girl's body, but she's determined to be as fierce and capable as she was in her last life. Even death cannot change the way of her, until she met that fateful man, the seventh prince, and her betrothed! The Slaughter Queen might be cold and aloof like a she-wolf, but in his arms, she's always the little wild cat...

(Source: Mangatoon)