Lucinda Penelope Valerie Black and the Silver Cup

Lucinda Penelope Valerie Black is a seventeen year old witch in her seventh year at Hogwarts School of Witchcraft and Wizardry. She is helping Harry Potter, Hermione Granger, and Ronald Weasley find and destroy Horcruxes. The problem is, Lucinda knows where every single one is. She knows the locket of Slytherin is with them, the diary Harry destroyed in their second year, and the ring was destroyed by Dumbledore died in their sixth year. She alao knows that Harry is a Horcrux along with Nagini (Voldemort's snake), the lost diadem of Ravenclaw, and the cup of Hufflepuff. Lucinda finds the sword of Gryffindor and uses it to destroy all of the Horcruxes but Harry who must give himself up to win the war. But when they get to Hogwarts, there is a turn of events. When Harry turns the Resurection stone thrice, Sirius Black, Lily Evans, Remus Lupin, and James Potter come back. Though they are back, they won't stay for long. Since Lucinda loved Sirius, he gets to stay until the battle of Hogwarts is over. And when it is over, he must leave earth. And he will come back as human if Lucinda reunites with her mother.

Disclaimer! I don't own anything part of HP! It rightfully belongs tp J. K. Rowling! I only own anything not part of HP!