Warning: This article contains spoilers for the season 7 premiere of Game of Thrones , Dragonstone.

We havent realized Dragonstone, the former stronghold of Stannis Baratheon, since he last occupied it during Game of Thrones season 4. But now that weve finally returned, it could end up being the most important location of all in Westeros.

Aptly named Dragonstone, the closing moments of the episode reveal Daenerys Targaryen finally returning to her birthplaceafter a lifetime away. Its a largely silent homecoming except for the emotional thumps of Ramin Djawadis score. That is until Daenerys constructs her lane to the head of Stannis war map, mentioning, Shall we begin?

But unknown to Daenerys, its now begun. While Kings Landing is very interested in Dragonstone because of Daenerys’arrival, others are looking to it for most varied reasons. Its ground contains a substance could help Westeros, above all else, survive the Long Night.

Dragonstones founding predates the Seven Kingdoms

While Daenerys ancestor, Aegon the Conqueror, took control of the Seven Kingdoms( except for Dorne) with fire and blood, Dragonstonea volcanic island simply off the coast of Westeroshas been in the hands of the Targaryens and their family for far longer.

In A Song of Ice and Fire , Dragonstone started off as a western Valyrian settlement around 500 years before the start of Game of Thrones. Valyrian magic was essential to forming the seem and intimidation factor of the castle. The Targaryens moved there 12 years before the Doom of Valyria after one family member had a prophetic dream, and they took their dragons with them. In the demonstrate, Samwell Tarly tells Gilly that the Targaryens built their first stronghold there when they invaded Westeros.

Screengrab via Game of Thrones/ HBO

We mostly know it as Stannis main palace in Game of Thrones , and the present touches on that aspect of its history in Daenerys return. Dragonstone was abandoned but his banners remained, ready for Daenerys to tear down.

Whats hidden beneath

Dragonstone is Daenerys first homebase in Westeros, but as Dragonstone reminded us, its also home to what might be the most significant hoard of dragonglass in the Seven Kingdoms.

Dragonglass, or obsidian, is a kind of glass shard formed from volcanoes. Both Sam and Meera Reed utilized dragonglass to kill White Walkers, but it was also used to form the Night King by the Children of the Forestand stop Benjen Stark from turning.

Stannis told Sam about Dragonstones dragonglass supply in season 5 after hearing Sams story of how he killed a White Walker with it, but it had largely slipped Sams mindand Sam likely didnt belief Stannis all that much. That all changes after Sam detects a map of Dragonstone( and its dragonglass reserve) in an age-old book he borrowed from the Citadels limited section.

Photo via Helen Sloan/ HBO

Screengrab via Game of Thrones/ HBO

All of the pages have nuggets tucked away, even beyond the introduction of Dragonstone as a be-all for season 7. On one page is thesuggestionthat dragonglass can be used to panacea diseases and that” little harm incures from the ingestion .” With a greyscale-stricken Ser Jorah Mormont tucked away in Oldtown, is impossible to that Sam might give him dragonglass to cure his ailments?

Screengrab via Game of Thrones/ HBO

While Sam and Gillys books dont explicitly say, Dragonglass kills White Walkers, so get your hands on all of it, it does hint at a certain kind of potential. One page states that the ancient Valyrians took dragonglass as well as gold from their ours beneath the Fourteen Flames while another revealed that Aegon the Conqueror descendants would decorate their weapons with dragonglass.

The royal style for dragonglass ornamentation soon spread throughout the Seven Kingdoms to those wealthy enough to render it: Hilts and pommels were and are the most common adornment, for dragonglass is too brittle to make a useful crossguard, the text read. Indeed, its very brittleness is what demotes it to the great houses and the most successful merchants.

Screengrab via Game of Thrones/ HBO

Pictured on another page is an example of one such weapon induced with dragonglassone weve assured before.

A familiar blade in an ancient text

A callback from Game of Thrones very first season, the dagger depicted in Sams old book is made of Valyrian steel( which can also kill White Walkers) and seems to be the same one used in the attempted assassination of Bran Stark. Tyrion Lannister is framed for the assassination endeavor, but the dagger, which also has a handle made of dragon bone, was be traced in the books to Robert Baratheon, who won it from Littlefinger; in the prove, Littlefinger claims that Tyrion won it. Ned has possession of the blade afterwards in season 1, and while its unclear where the knife is right now, Littlefinger takes it back in the books.

Even before the illustration showed up, weve already seen the blade. Maisie Williams, garmented as Arya Stark, appeared to be wearing it in a photoshoot for Entertainment Weekly .

The question is, how does she get it? And made its pictured in a passageway about Dragonstone and dragonglass, how much of a role will it play?

Bringing the two dragons together

The most important aspect of the scene is that it inspires Sam to write Jon about itand perhaps drive much of Jons season 7 plot.

Its unclear if Sam knows that Jons no longer Lord Commander, so if thats the suit, the letter would reach Dolorous Edd first, which is able pass it on to Jon. Or, if Sam does know about Jon taking back Winterfell, he could get onto straight-out there. Either style, whenever Jon receives the letter, his track will be clear: Go to Dragonstone, where Daenerys will be waiting for him.

Jon might not be interested in the conflict for the Seven Kingdomsthe threat from the north is all that mattersbut its possible that he might have to care about it enough to get Daenerys on his side. Shes crucial not just for her dragons, but what she sits on under her new throne.

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