The 3 Celestial Shields feature the Pi Yao, the Chi Lin and the Fu Dog. Together, these three celestials provide robust spiritual protection against forces out of your control, allowing you to take charge of your own destiny. They protect you from the external chaos in your wider environment, forming an invisible shield around you so whatever happens outside does not hurt you.
As the 3 Killings is in the EAST in 2021, this also directly affects all. You can hang off your bag as a bag decoration, clip onto your belt loops, or use as a keychain.