The Nights Watch are the men assigned to protect the Wall and swore an oath to help keep any threats beyond it at bay, but sadly, in the Season 7 finale "The Dragon and the Wolf," they failed, miserably. The Wall was thought to be a virtually indestructible divider separating the Free Folk and the Seven Kingdoms ─ a mounding magical protective barrier that would also keep the monsters away. In fact, many Game of Thrones fans were so sure of its magic that theories suggested alternative methods for the Night King and his army to get past it.
One theory thought it might have been the freezing of the sea that would allow the White Walkers to journey into Westeros. Another suggested that the mark the #NightKing left on Bran would do the trick, but no. While it took Joshua an army to break down the wall of Jericho ─ it only took the Night King and his pet dragon Viserion to undo centuries of work that Bran the Builder and the Children of the Forest started, but how?
Was The Wall Ever Magical In The First Place?
When talking about the destruction of any monstrous structure, the first thing that comes to mind is what's it made of, and the kind damage it could withstand. In the case of the Wall ─ the alleged 300 mile-long 700 ft structure block of ice was more than just some frozen water, at least according to Game of Thrones author George R.R. Martin.
"The Wall has undoubtedly 'eaten' a lot of crushed stone over the centuries and millenia... But there's a lot more ice than there is stone... Yes, the Wall was much smaller when first raised. It took hundreds of years to complete and thousands to reach its present height."
If we look at the history of The Wall, we'll find that quite a bit of effort went into creating this mounting block of ice and stuff. According to legend, the construction began after the Long Winter with Bran the Builder, founder of House Stark and one of the First Men, working with giants and the magic of the Children of the Forest. It was built to insure the wall would prevent the army of the dead from reaching Winterfell and beyond. While there isn't any hardcore proof of Bran building the wall, or that the Children of the Forest helped, George R.R. Martin speak on it back in 2000.
" Much of those details are lost in the mists of time and legend. No one can even say for certain if Brandon the Builder ever lived.... But one thing I will say, for what it's worth -- more than ice went into the raising of the Wall. Remember, these are fantasy novels."
The books are often the resource hardcore fans turn to when they want answers, and usually there's something there that helps explain the show. For example, in the book A Storm of Swords, when Meera asks why they didn't bring the person they called Coldhands with them to Castle Black ─ Gilly explains that magic is what keeps outsiders away.
"The Wall is more than just ice and stone … There are spells woven into it … old ones, and strong."
The show hasn't followed the books for a while, as it has developed into a story of its own. Still, whether it be the show or the books, we may never know definitively if Bran and the Children of the Forest built the wall. However, in the show we do know that it did possess something magical that hinders the walkers from crossing. In the Season 7 finale, we saw the walkers watch idly as they awaited for their dragon-riding leader to arrive. If they were able to cross, why not just charge?
Of course there's the off chance the Night King wanted to make a grand entrance, but I'm sure it's more than that. I mean, how else can you explain the Night King not flying Viserion over the wall and turning all of Castle Black into snow ash? Because he couldn't. Evidence of magic was given in Season 4 when wights tried to enter the cave of the Three-Eyed-Raven when Leaf, a member of the Children of the Forest, explained that wights are powerless against their magic.
"They cannot follow us the power that moves them is powerless here"
Also in the show, good old uncle Benjen Stark (R.I.P.) explained why the wall served as more than just a barrier between the Free Folk and Westeros in Season 6 while speaking with Bran.
"Ancient spells were carved into its foundations. Strong magic to protect men from what lies beyond. And while it stands, the dead cannot pass.”
So, one would think, with all that magic and the number of mystical creatures the wall was able to keep out ─ it would have taken more than just a dragon to tear it down. Then again, these dragons are very special.
A Blend Of Fire And Ice Proved To Be The Perfect Storm
Dany rescuing The Seven served a major purpose for the Night King, a trap he may or may not have have set in order to secure a dragon. Maybe he knew just how special Daenerys's dragons were. The power of the dragons lies deeper than their fiery breath. As a matter of fact, according to #GoT Wiki, magic and dragons are one and the same.
"Dragons have a strong connection to magic, and magic is strongest in their presence, even more so the stronger they are."
Beyond that, Dany's dragons were born in a special set of circumstances. Back in Season 1 Episode 10, the burial ritual for Khal Drogo had Dany step into the fire and from it, her dragons were born. There was also the magical witch Mirri Maz Duur burning with Dany, her husband and the dragons. One can imagine Duur's magic may very well be part of those dragons. Now the Night King has one, a dragon that breathes a blue flame powerful enough to undo the magic that was done thousands of years ago. Like a blowtorch to a block of ice, Viserion destroyed the wall still leaving some fans pondering how, and everyone south of the wall in danger.
What kind of magic do you think zombie-Viserion was spewing out?