Song used in the after credits scene of Boku no Hero episode 47 with the introduction of All For One On episode 47 of Boku no Hero, after the credits scene when All For One is introduced, there's a piano and operatic and just so chilling.

What's this song?
that's all for one theme (you can't run) 
https://soundcloud.com/thighpocket/my-hero-academia-all-for-one-theme