That doesn’t make sense at all. It could easily be some kind of poison curse that takes 7 days, that doesn’t mean if they get stabbed they’ll just be invincible, or if they die that the curse didn’t work, it just means something killed them sooner.
It doesn’t have to be an all powerful curse necklace that literally changes the entire universe to make you avoid death under all circumstances for the next 7 days.
Thanks, I appreciate it.