The Grafted Blade Greatsword, which can be obtained by killing the Leonine Misbegotten boss at the end of Castle Morne in the Weeping Peninsula, is a reference to the Iron Throne from the book series "A Song of Ice and Fire" by George R.R. Martin, as well as its television adaptation "Game of Thrones." The sword was likely included in the game as tribute to George R.R. Martin's work as he worked with Hidetaka Miyazaki to create the lore of Elden Ring's world.