24 of Quotes - a very christmassy break-in

Welcome stranger, welcome to the Fortress of Quotes.

High black walls between the trees of a gloomy forest.
Immense towers.
Hundreds of little turrets filled with diamond beset Christmas Trees and stockings embroidered with stars made of real gold. They reach high up to the sky, so high, in fact, that the air is thinner up there, as if you were in the huge Sikurzoi mountains between Ravka and Shu Han and not on a human-made fortress.
Still, the really extraordinary treasures - yes, even more so than the small ships laden with the finest gingerbread cookies that fly through the air (and are said to have been made by Nikolai Lantsov himself) - the really extraordinary treasures you won't find in the towers. For these are stored underground in a labyrinth of vaults dug deep into the earth.

You want to see what's in there? Then I must let you know: no stranger ever gets to see the vaults. You'd have to get in secretly - unseen, unheard and unnoticed.
An impossible break-in, you say? Well, we all know, when people say impossible, what they usually mean is improbable.

And I happen to know just the team of talented criminals for your purpose...

- advent calendar with one six of crows/crooked kingdom quote each December-day until Christmas -