It killed the "hero’s journey" trope. By murdering Robb Stark—the perceived protagonist—the show forced the audience to realize that in this game, no one is safe, effectively restarting the story's stakes from scratch. 4. The "Two-in-One" Stark Girls
It serves as the psychological beachhead for the invasion of Westeros. Juego de Tronos 2x1
It wiped out the Northern leadership in a single night. It killed the "hero’s journey" trope
Here is a feature exploring this "double-edged" nature of Westeros: no one is safe
Hidden beneath its volcanic crust is the Dragonglass—the only "currency" that matters when the Night King arrives. It’s a castle and an armory rolled into one. 3. The Red Wedding’s Double Strike