User blog:TOkun592/Samwell, Craster's Last Living Son.

Here's a theory on Baby Sam, Samwell Tarly's adopted son. This is short, but very good.

Melissandre, or someone else with dark powers, will know of a way to kill most of The White Walkers. This will require the sacrifice of a male blood-relative. The only living one left is Baby Sam. Craster boasts in his final appearance of having 99 sons, not yet knowing of Baby Sam. His final son is left for The White Walkers, making it an even 100. I'm guessing Jon Snow is offered the opportunity to kill these 100 White Walkers, at the expense of Baby Sam's life. I don't think he'd take the offer, but it'll be there, haunting him.