talisman

talismaani A magical object worn for protection ward off|against ill will, or the supernatural, or to confer the wearer with a boon such as good luck, good health, or power(s).
1997 — John Peel, War of the Daleks, ch. 10 p. 233

She kept low, clutching the rifle she'd taken as though it were a magic talisman, as if it would somehow protect her even though she didn't fire it.

I have in my possession three Magic Talismans, which I have ever guarded with utmost care, keeping the knowledge of their existence from anyone else.