While most of the attention has been on the massive battlefield sequence on Sunday night's Game of Thrones [1], we have to remember that there was a second battle (or near-battle) at hand as well. While some of Westeros's best fighters and biggest armies face off against the Night King's army [2], the non-combatants wait deep in the crypts of Winterfell [3], which they assume are the safest place to wait out the battle. Sansa Stark, Lady of Winterfell, leads this group, along with sort-of-ex-husband Tyrion Lannister [4], and even though Sansa has never been a physical fighter, she's prepared, thanks to her sister, Arya.

Before the sisters go to their separate stations, Arya hands her sister a dagger to protect herself and those hiding in the crypts. "Stick 'em with the pointy end [5]," she teases when Sansa protests she doesn't know how to fight. The dagger Arya gives to her sister isn't just any dagger, though: it's one of the daggers [6] that Gendry has been forging. Not only is it a subtle connection between two people Arya considers "family," but it serves to foreshadow a plot twist that many were already expecting.

Arya specifically gives Sansa not just any dagger, but one made of dragonglass [7]: the substance that's effective against wights. Theoretically, with Sansa and the others hiding in the crypts, they shouldn't have needed an anti-wight weapon, but as many fans had predicted, it nearly came in handy. The Night King raises the dead in Winterfell's crypts [8], leaving Sansa to lead the way to try to get everyone there to safety. Fortunately, Arya is able to kill the Night King [9] — destroying his army at the same time — before Sansa actually needed to use the dragonglass dagger. Even so, it's the first time we've seen Sansa fully battle-ready and this close to actually entering the fray of combat, and it's a great moment for the character as the series hurtles towards its epic conclusion.