A Black Bird's Cry-A Mulan OUAT Fanfic

Mulan and Tai-Lin were born and raised on a dire prophecy that one would be the end of the other when the sisters took the paths of both light and dark. The were also born and raised on a promise that they would be protected by a man as long as he was alive. But what happens when he can no longer protect them? It is up to the sisters to decide their own fate.