Second Life (Warrior Cats.)

Tigerstar, leader of Shadowclan and traitor of Thunderclan, has died. When his violent and unforgiving killer gets killed at the claws of Firestar, the reason for Tigerstar's failure, he sees his chance for revenge. The very moment Scourge dies, Tigerstar brings him to the Dark forest and tells him that he can grant Scourge a second chance at life, if he destroys the clan.
Based on a YouTube animation that I found, but that is not finished I am also adding my own ideas. So I am making the rest of the story line. If the maker of that animation is reading this, I really love it and I hope you at least think this is a okay story.