The Seven Star Sash is a standard item and can be obtained through the normal method of breaking Boxes/Vases or slaying officers. In Dynasty Warriors: Online, you either pay AP (real money) for it, get it as a reward for the Musou Board, or very rarely as a craft bonus. To obtain the item in Warriors Orochi 3, have Ryu Hayabusa in the main party during the Battle of Changban in Chapter 3 (first version). Earn 1,000 K.Os to trigger the rare item report.