It seems the lead group of walkers is forming the Stark's direwolf sigil.
http://mashable.com/2017/08/30/bran-night-king-stark-wolf-clue/
It seems the lead group of walkers is forming the Stark's direwolf sigil.
http://mashable.com/2017/08/30/bran-night-king-stark-wolf-clue/