In case you didn't find the White Walkers on Game of Thrones terrifying enough, they love to drive their message of death to all humankind home with a big display. With Tormund, Beric, and Edd seeing it firsthand in the Season 8 premiere, there are already a ton of Reddit theories about the Night King's symbol on Game of Thrones. Little Lord Umber as a wight was nailed to a wall with limbs of the other slain Northerners around him to make a spiral symbol. This isn't the first time that the Night King has utilized the dead to make a symbol. So as Game of Thrones approaches its endgame, it's got people speculating what the Night King is saying with this symbol.
Back in the very first episode of Game of Thrones, some dead Wildlings were assembled in a symbol by the White Walkers. Since then, the Night King's artistry has popped up a few more times — and even seemed to be present in the cave drawings at Dragonstone. But while you might have missed these symbols before the Season 8 premiere, they're clearly very important to the Night King. For example, back in Season 3, Episode 3, Mance Rayder noted, "Always the artists," upon seeing the spiral symbol made up of dead horses. Mance noting this means that even though viewers have only seen the symbol a handful of times, it's clearly something the White Walkers do all the time.
As you can see by these photos assembled by Reddit user SyntheticLife, there are two different symbols that the White Walkers have created — a circle with a line through it (like in the first episode) and a spiral (like in the Season 8 premiere). Both types of symbols have popped up in the cave drawings done by the Children of the Forest that Jon showed to Daenerys. So if you think there has to be more to these symbols than the Night King just getting creative, these Reddit theories are for you.