Fool Prince’s Super-power Consort

She was originally the eldest daughter of the direct descendant of the Duke of Zhenguo Palace. Her father did not like her and her mother had died a long time ago.
An imperial edict had chosen the Mansion of The State Direct Daughter as the foolish Qin Wang Princess. She, who had originally admired the King of Zhao, had become the shield for her stepsister.
After being killed by mistake, what kind of brilliance would a cowardly soul emit when replaced by a genius who possessed a Special Ability?
So what if you're a foolish king, her plant Special Ability can take a person's life and can also send a person's life, what if you can't cure a fool?