Upgrading your armor set (this includes your Suit, Gauntlets, Boots and Helm) to 3 grants yourself a bonus to your hit rate, block chance and defense. You will also emit a glowing aura once you have reached this checkpoint. Of course, when you have higher upgrades, you will have a brighter aura and more bonuses. At 8, you get one shining hand. Then at 9, your legs glow, and lastly, at 10 (what a feat!), both of your hands shine, and you are overall very, very shiny.