Inside, there was a lock of black hair, a piece of a nail, and a small rolled paper with a spell written in a language I did not understand, but I recognized two words: "Bind" and "Dwell".
Tbh I think it would be a fun idea to add it to my stories but I'm aware that to add periods in a story in a way that doesn't feel like it's just a plot tool it will need a lot of planning and keeping tracks of when does everything happens and what kind of cycle each character