(Pictured here with original amulet, not a replica.)
"The Promise" has, as a central item, a wolf's head amulet, carved from a dark beach rock. The back story of the amulet is one of the things you should discover as you play "The Promise".
To find out about the wolf's head amulet, ask people about it, and remember it.
The amulet has been your father's ever since he was your age. He returned with it after a day in the forest. When he finally came home, after dusk, just before search parties were formed to go in and find him, he was wearing it. He claims he spent a day carving it in the forest, but the story is far more interesting than he ever said. Find out why.
Another iconic item in "The Promise" is the letter. If you play through, you will receive a letter, folded and sealed in wax. It is addressed to your mother in the runes of the Language of the North.
The letter is, as it is in-game, sealed with the seal of the Elder, a wolf's head symbol. You can, as you can in-game, break the seal and read it if you so desire. However, you were specifically asked by the Elder for your promise not to open and read it.
(This is not made available as a print-your-own, for obvious reasons. Or if it's not obvious, the reason is, it's sealed and private.)
What you do is up to you.
(Pictured here, the letter - you get one, not two; this is just so show both sides - and a replica of the amulet. Each amulet replica is hand-formed.)