BoR was added into the game at patch 0.10.8c . So that would mean you haven't played in a VERY LONG TIME and you should do research on your own. Or play the game through once more since the game has changed a lot.
Tip for the future: Have a question about POE? Go to google and type in POE BOR or POE (insert the question here) and you will get a lot of answers.