She gets reincarnated as a commoner in the same era and spreads a rumor.
"The King has a small dick." She says as she goes around the town. "He killed a woman after she saw his small dick." She says.
Everyone gets angry. And some people go to the castle. The king kills them and then he comes to look for who said it.
He finds out that it's her. The woman he killed earlier.
"Impossible!" He shouts. "You died. You can't come back!"
He kills her again. This time stabbing her in the stomach.
She reincarnates again.
And spreads the same rumor again.
The king kills her again. And again and again. But every time he kills her, she comes back.
Until he gets tired and exiles himself to a forest.