The dagger that killed the Night King was a Valyrian Steel blade, famously wielded by Arya Stark. This particular weapon is widely known as the Catspaw Dagger.
The Dagger's Identity and Lethal Impact
During the decisive Battle of Winterfell, Arya Stark used her stealth and combat prowess to surprise the Night King in the Godswood. With a swift movement, she plunged the ancient Valyrian Steel blade into his torso. The immense power inherent in the Valyrian Steel, a rare and magical metal, proved to be the Night King's undoing.
The impact of the blade caused the Night King to shatter instantly, a cataclysmic event that had far-reaching consequences across Westeros.
Key Outcomes of the Night King's Defeat
The magical connection between the Night King and his creations meant that his demise triggered a chain reaction that brought an end to the existential threat he posed:
- The Night King was shattered upon impact, ending his reign of terror.
- All other White Walkers immediately perished, disintegrating into ice shards.
- Their vast army of wights, which had terrorized the living, collapsed and turned to dust, losing the magical force that animated them.
- The War for the Dawn, the epic struggle against the dead, thus concluded, saving humanity from eternal darkness.