Carina Black: Child of Prophecy, Child of Power

When Walburga Black gives birth, she gives birth not to one child, but to twins- Sirius and Carina Black. Sirius's destiny is one we know- one of loyalty and heartbreak, but Carina's is far, far different. Raised to change the world, she knows her destiny like the back of her hand. But when her ambitions are challenged by family, morality, and Lord Voldemort, how does she react? AU