<Tr> <Th> Aliases </Th> <Td> The Others </Td> </Tr> <Tr> <Th> Type </Th> <Td> Non-human creature </Td> </Tr> <P> A White Walker is a humanoid creature from the HBO television series Game of Thrones, and the George R.R. Martin novel series A Song of Ice and Fire on which it is based . Primarily referred to as the Others in the novels, White Walkers are a supernatural threat to mankind who dwell north of The Wall in Westeros . The Verge named them among "the most visually iconic creatures on the show". White Walkers are also featured in the show's merchandising . </P> <P> Martin introduces the Others in the prologue of A Game of Thrones (1996), describing them as "Tall...and gaunt and hard as old bones, with flesh pale as milk" with eyes "deeper and bluer than any human eyes, a blue that burned like ice". Accompanied by intense cold, they wear armor that "seemed to change color as it moved", and wield thin crystal swords capable of shattering steel . The Others move silently, and they speak their own language; Martin writes that their voices are "like the cracking of ice on a winter lake". In A Storm of Swords (2000), they are shown to be vulnerable to weapons made of dragonglass (obsidian), as Samwell Tarly kills one this way: </P>

When do you see white walkers in game of thrones