But throw a dragon into the equation and there's now a way for the zombie army to burn the wall to the ground and simply walk right on through. Since Game of Thrones' Season 7 penultimate episode aired on Sunday, this has been the biggest question on fans' minds.
There was also the scene earlier this season where Bran tried to watch the undead army through the eyes of a raven, and the Night King pushed him out.
"The Dragon and the Wolf", the finale of Game of Thrones' seventh season, airs August 27 at 9 p.m. on HBO. Joramun was the King-Beyond-The-Wall who joined forces with the Stark King Of Winter to defeat the infamous Lord Commander known as the Night's King.
The series has had many villains during its seven season run - but none have been as terrifying as the Night King. White Walkers are an ancient race of ice creatures created thousands of years ago when the Children of the Forest-specifically Leaf-drove a shard of dragonglass through the heart of one of the First Men. In addition to being perplexed by the episode's wonky timeline and those seriously odd conversations between Arya and Sansa, we also had to wonder how in the hell the Night King appeared to know that Daenerys's dragons would show up to aid Jon Snow.More news: Trevor Siemian wins Broncos quarterback job again, AP source says
But now that Viserion is the Night King's ice dragon, that theory seems to have been blown to smithereens. The Night King knew when Bran was viewing his army, and is able to grab Bran's arm through the telepathic link. But would killing him do more than just eliminate a lot of wights?
Even with what little we know about the Night King, the evidence is there.
If when the dead finally get to the Wall we see a wight or White Walker touch it and explode, this is what we'll expect to happen. The theory explains that Bran traveled back in time to warg his way into the man who later became the Night King, with the goal of stopping the Children of the Forest from creating the White Walkers in the first place.
Whether you believe the theory that Bran is the Night King or not, the similarities between their abilities can not be ignored.More news: Amid Resignation Calls, Missouri Democrat Apologizes to Trump for Assassination Comment
So to capitalise on everyone clearly craving his hot blue noggin, Facebook has allowed any civilian to feel the joys of being the Night King - just without feeling the cold sting of being dead. So make sure you're not stuck in the past.
Or maybe one of the reasons the White Walkers needed such a massive army was because they are planning to use their massive numbers to form a ramp out of their bodies. It means that everything that has happened until this point has been going according to his plan, or at least he has been able to attempt to influence the future by seeing how things might go.
We're just two days away from the season finale of Game of Thrones.More news: Microsoft exec enthuses about "no compromise" Xbox One X