This Game of Thrones theory about The Wall and Sam could be very important

Winter is here.

If you're one of the two people in the realm that aren't up to date with all things Game of Thrones, look away now. Final warning because we don't want you to be grumpy at us after discovering a potential spoiler below. Okay, so the most recent season has come to a thrilling climax with the wonderful double-bill of 'Battle of the Bastards' and 'The Winds of Winter' but fans still have so many questions to be answered. We've already outlined some of the things we expected to see in season seven, but we've still not really gotten around to one of the most pressing issues - The Wall and the ever-increasing threat that's posed by the White Walkers. We learned at the end of last season that The Wall contains magic which up until now has prevented the White Walkers from advancing to the realm of men. It's why Benjen Stark had to leave Bran and Meera as they make their way back south. Some have speculated that the fateful touch from the Night King that allowed the White Walkers to access the Three-Eyed Raven's lair could also negate the protective spells that surround The Wall. While this may still come to pass, the army of the undead may be able to pass The Wall for a much simpler reason. You might recall the moment in the second season when Sam and his fellow Night's Watch members discovered a cache of weapons that were made of Dragonglass, buried in the snow beyond The Wall. This snap might jog your memory. Some people believe that this horn could be the same one that's being used on the cover of George R.R Martin's highly-anticipated next instalment in the A Song of Ice and Fire series, 'The Winds of Winter'. What does this all mean then? Well, right now in the show, Samwell Tarly has finally reached the Citadel at Oldtown as he studies to be a Maester. In George R.R. Martin‘s books, the horn that Sam discovered beyond The Wall is believed to be the Horn of Winter (or the Horn of Joramun). The legend goes that this has the power to bring down The Wall when blasted. In the novels, Euron Greyjoy (Theon and Yara's demented uncle who became the newly proclaimed King of the Iron Islands after some mischievous fratricide) raids Oldtown - the city where Sam is currently spending all of his time studying. While the show and the books do differ, if this happens then it's safe to assume that Euron is probably going to steal Sam's prized possession and could even give it a little toot out of curiosity. Book readers will also know that in the novels, Euron's brother Victarion is currently in possession of a different horn, Dragonbinder , which has the potential to tame dragons. We know nothing about the direction that current showrunners are going to take with the TV series but Euron Greyjoy might be about to have a very prominent role regarding to the future of The Wall or Daenerys Targaryen and her dragons. April can't come quickly enough.