In this part, we start and complete Chapter 5 of the Main Story. Collectibles: 1. All Chapter Chests Obtained. 2. Buster Sword Obtained. Additional Info The Buster Sword has a Proficiency Percentage that is visible on screen most of the time. This shows our mastery of the Buster Sword, and it takes an extremely long time to get to 100%. There are various factors that need to be addressed in order to achieve mastery, and I'll be tackling that in a future video. For reference, and so you can work on it as you continue through the game with me, here are the things you need to do: 1. Enter Battle Stance, and tank enemy attacks with the temporary invincibility until you stop gaining percentage. You will only get about 0.07% per attack you tank, hence why this takes forever. This will contribute to about 30% or slightly more of the entire Percentage. 2. Enter Battle Stance and use Strong Attacks to defeat enemies until you stop gaining percentage. This will be another 30% or so (60% total now) and builds slowly around 0.25% per kill. 3. Enter Battle Stance and use Command Materia for kills (such as High Jump), until you stop gaining percentage. This will be another 30% or so (90% total) and builds slowly around 0.25% as well. 4. While focusing on the previous three for their 90%, you will automatically unlock the Damage Limit Break for the Buster Sword via an on-screen prompt after a battle. This happens at a random time for everyone, but it will inevitably happen for you. 5. The last bit of percentage requires a few other factors. For the final 10%, you'll need to find enemies that have Barriers around them. You can fight the Mock Troops in Mission 9-6-5 for this. Simply defeat them while you work on the other 90% above and eventually you will unlock Barrier Piercing for 5% and after a while longer, you'll unlock Barrier Break for the other 5%. You'll be fighting a ton of Mock Troops for this, so you'll definitely start to feel like nothing is happening, but it is. Stay patient!