Here’s a little tidbit that not all A Song of Ice and Fire readers may even remember: There isn’t a Night King in the books, at least not yet. The Night’s King is only a legend from one of Old Nan’s stories, with a very different history. We’ve gotten no indication, except from the show itself, that there will even be a leader of the Others. The invasion from the North is likely to take a very different form in Winds of Winter compared to Game of Thrones, and here’s a comfortable bet: No undead dragon will take down a chunk of the Wall. But the Wall will indeed fall—not through the hands of the Night King, but through the foolhardy hands of man. Specifically, Euron Greyjoy.

Euron Greyjoy, Tear Down That Wall

The Night King is one of the more clever inventions in Game of Thrones, and— despite the hamhanded way Jon Snow’s adventure north of the Wall was handled—his destruction of a part of the Wall using his undead dragon clears the way for the White Walkers to invade Westeros at last. Whether the Night King shows up in the books or not is an open question, but we’re comfortable making this assertion: He won’t tear down the Wall with a dragon. The Wall has to fall, and the Horn of Winter will destroy it. In all likelihood, even if there is a Night King in Winds of Winter, the horn of winter will be blown by man.

Why? First, the fabled Horn of Winter, alias Horn of Joramun, has been long-established in the books as the ancient deus ex machina that can destroy the Wall. Mance Rayder claimed to find it, but was lying. Jon Snow, on the other hand, found an ancient and dusty warhorn at the Fist of the First Men, wrapped in a Night’s Watch cloak along with some dragonglass. This ancient horn, cracked and broken, plain in appearance, may well be the true Horn of Winter, and Sam currently has it in his possession in Oldtown.

So where does Euron come in? A popular fan theory, called the Eldritch apocalypse, suggests that the Greyjoy leader has nefarious and mystical intentions. He also has an interest in old horns, thanks to the Valyrian dragonhorn, Dragonbinder, he entrusted to his brother Victarion. He’s likely to use that horn to steal one of Daenerys’s dragons, and may end up summoning an actual kraken and unleashing the terror of the deep on southern Westeros. In short, he’s bad news, and has dark and terrible powers already at his disposal, and more to come. He’s likely to become Daenerys’s primary antagonist in Westeros, probably a more dangerous threat than Cersei herself.

Euron has already launched raids down the coast of the Reach, heading towards Oldtown. He may soon be able to strike. And when he’s there, who’s to say he won’t find Sam’s old horn, the lost Horn of Winter, and through his hubris bring the Wall crashing down? Whether he does it in the end or someone else does, it’s far more fitting if the humans bring the Wall down as a result of their petty political games; it will be the ultimate act of short-sighted self-destruction, and it’s not far away.