cruelprinces:

To the Dark Lord. I know I will be dead long before you read this, but I want you to know it was I who discovered your secret. I have stolen the real horcrux and intend to destroy it as soon as I can. I face death in the hope that when you meet your match, you will be mortal once more. R.A.B.

@becauseannabeth asked regulus black or luke castellan