None, just don't change the song.
Credit to BurnstarTC. Riverfur was a Windclan cat. Her mother was Goldenstar and her father was Rainstar/Rainfall. She fell in love with a Thunderclan tom, Robinfeather. She had kits with him. She didn't name them because she wanted him to be there when they did. Goldenstar found out about Robinfeather, and she was forced to banish Riverfur from Windclan. Riverfur made her way to Thunderclan, with the kits. While she was crossing the stream between the two clans, the kits slipped from her grasp and were dragged downstream into the lake(There had been a flood recently). When she explained what had happened to Robinfeather, he disowned her. She was an outcast. She killed herself because of her sadness. She found herself on the border of Starclan of the Dark Forest, not able to enter either. She grew angry because Robinfeather had caused this. She began tormenting and killing his kin and descendants. One day, she returned to the border, and found that she could only enter the Dark Forest. Her rage grew, because Robinfeather had been the cause of all of her problems. She lived in the Dark Forest, but continued to torment Robinfeather's kin. She plotted a new way to get revenge....
