Having a Valyrian steel sword is a huge deal in Game of Thrones. Firstly, because ever since the doom of Valyria, the knowledge on how to forge new blades has been lost, thus making any Valyrian Steel in Westeros a treasured family heirloom. They're also extremely important for their usefulness against White Walkers — as fan-favorite Jon Snow learned awhile back:
In Game of Thrones' "Blood of my Blood," Sam Tarly left his family home in Horn Hill in the possession of Heartsbane, the Tarly's ancestral Valyrian steel sword. While in A Song of Ice and Fire book series there seems to be quite a bit more of the valued steel laying about, in the TV show we haven't seen all that many swords. Considering Winter has already come, it's important to know who would be on the winning side in a duel with a White Walker.
These are the blades shown in Game of Thrones so far, their current owners and whereabouts. Take note!
As said before, it belongs to House Tarly and has been in the family for over five hundred years. Since Sam is a Tarly himself, it remains in the family. It is a two-handed great sword with a jeweled scabbard. Randyll Tarly, Samwell's father and former Lord of Horn Hill, wielded Heartsbane in Robert's Rebellion (where he sided with the Targaryens), and later wore it while supporting King Renly Baratheon in the War of Five Kings. Now that both Randyll and his son Dickon are gone, Sam is actually the only Tarly left to wield it.
Whereabouts: Currently on the road with Sam and Gilly, possibly on the way to Winterfell.
Longclaw once belonged to Jeor Mormont and, for five centuries, it was the ancestral bastard sword of House Mormont. Upon taking the black and joining the Night's Watch, Jeor passed it on to his son and heir, Ser Jorah Mormont. Later, when Ser Jorah was caught selling poachers into slavery and went into exile, #Longclaw was returned to his father at the Wall.
In Season 1, #JonSnow saved Lord Commander Jeor Mormont from a wight, and Jeor gifted him Longclaw. He changed the pommel from a bear — sigil of House Mormont — to a direwolf, representing House Stark. Jon has used Longclaw to defeat #WhiteWalkers a couple times and, in "Beyond the Wall," Jorah Mormont passed on Longclaw to Jon Snow for life.
Whereabouts: Longclaw is traveling South from the Wall, as Jon Snow is taking a Wight to King's Landing.
Oathkeeper is one of the two blades reforged from Ice, the Stark ancestral Valyrian great sword, under the orders of Tywin Lannister. Tywin gave the blade to his son Jaime who, in turn, gifted it to Brienne. He charged her to use it to find and protect Sansa Stark, and Brienne named it in reference to the oath she swore to Catelyn Stark.
Whereabouts: Oathkeeper and Brienne are bound to King's Landing, at Sansa's command, to represent the Lady of #Winterfell in a gathering at King's Landing.
This is the second and smaller blade reforged from Ice, presented by Tywin Lannister to his grandson King Joffrey, as a wedding gift. The name Widow's Wail came as a suggestion from an unnamed guest at his pre-wedding breakfast, but Joffrey decided to keep the name, because it reminded him of Ned Stark's beheading. When Joffrey died at the Purple Wedding, Widow's Wail passed on to his younger brother Tommen and, after Cersei's last child committed suicide, the sword passed on to their father, #JaimeLannister.
Whereabouts: In King's Landing with Jaime Lannister.
Back in the first season, Bran survived an assassination attempt in Winterfell. The hired assassin wielded a dagger made of #Valyriansteel and a dragonbone handle. Upon investigation, Catelyn discovered that the blade belonged to Petyr Baelish, who claimed he had lost it to Tyrion Lannister on a tournament bet. The dagger is later seen on Eddard Stark's table, while he was acting as Hand of the King.
After presumably staying in Littlefinger's possession for six seasons, #Catspaw finally reappeared in Game of Thrones Season 7. In "Spoils of War," Petyr gave the dagger to Bran Stark (possibly as a means to gain influence with the Three-Eyed Raven), but Bran was quick to pass it on to Arya. Later, in "Beyond the Wall," Arya threatened Sansa at first, then handled her the dagger.
Whereabouts: With Sansa Stark, in Winterfell.
Dark Sister is one of the two ancestral swords of House Targaryen — the other being Blackfyre. It was wielded by Visenya Targaryen, the elder sister of Aegon the Conqueror. Dark Sister was passed down through Targaryen generations, until it ended up with the legitimized bastard son of King Aegon IV, Brynden Rivers a.k.a. Bloodraven.
Brynden was the Hand of two kings and later, Lord Commander of the Night's Watch. It is said he took Dark Sister with him to the Wall. He disappeared beyond the Wall on a ranging party — much like Benjen Stark — only, Brynden became the Three-Eyed Raven. Now, the Raven is dead, but Meera escaped the cave with Bran and (surprise) a sword.
SmokeScreen came up with a theory that the sword might be Dark Sister itself. If it was in the cave, and the cave belonged to the Raven (who was actually Brynden Rivers — did you get it?), it may just be that we got a glimpse at Dark Sister after all.
Whereabouts: Possibly with Meera Reed, traveling to Greywater Watch.
With the ever looming threat of the Night King's army marching south to the Wall, and with the Battle for the Dawn closer than ever, every Valyrian steel sword will be invaluable for the survival of Westeros. Luckily, Jon Snow has brokered a treaty with Daenerys, allowing him to mine dragonsglass from Dragonstone, so they can make weapons (with Gendry's help) against White Walkers. But, although Valyrian steel has proven useful to kill Walkers, the question remains of whether or not it will be of any help to fight the Night King.
Which Valyrian Blade is your favorite on the show?