Fair warning: This post contains spoilers for all of Game of Thrones books and episodes.
It's excellent advice for lawyers and omniscient stoners in fantasy series: Don't ask a question you don't already know the answer to.
Arya Stark was handed a shiny, deadly new toy in episode 4 of Game of Thrones last weekend: A Valyrian steel dagger. She was given it by her brother Bran, who not long before had been handed it by resident slimeball Littlefinger.
The dagger was used by a cutthroat who tried to murder Bran in Season 1, and as Littlefinger points out, in a very real way it started the War of the Five Kings. After fighting off the assassin, Catelyn Stark took the dagger to Kings Landing because she suspected the Lannisters were behind the attempt on Bran's life. Read more...More about Dagger, Jon Snow, Bran Stark, Arya Stark, and Game Of Thrones Season 7