Reinforcing the 12 Grimmauld Place wards was not as hard as Sirius had assumed. They were certainly dark, but that’s not surprising. I doubt there were many wards that were not classified as dark. Wards were to help protect and protecting could mean using any means necessary. The stories I have read about some of the ancient Egyptian wards were nasty, not that mine wouldn’t be as well. These were Gaelic in nature, which was predominately the runic language I used in my first life. Especially given that these were ancient and tied to Archfey. 