After chapter two, Serah can acquire the Azrael bow, a weapon said to have the power to change the owner’s destiny. Oh, and more importantly in battle it boosts your chain bonus. Here’s the catch, Azrael is a downloadable weapon and you can only buy it if you get Final Fantasy XIII-2 for Xbox 360.
Developer Square Enix says this weapon was created through a collaboration with Microsoft meaning its exclusive to the Xbox 360. You still have to purchase Azrael to use it and the legendary weapon costs 80 Microsoft Points ($1).