Increase Vulcan Arm and Axe Boomerang damage by 15%. ------------------------ When refine level is 7 or higher, increase Vulcan Arm and Axe Boomerang damage by additional 15%. ------------------------ When refine level is 9 or higher, increase Vulcan Arm and Axe Boomerang damage by additional 15%. ------------------------ When refine level is 11 or higher, increase Vulcan Arm damage by additional 15%, reduce Axe Boomerang cooldown by 2 seconds.