The Duke's Archives

Seath's library tower and its prison. Spinning staircases, Channelers and crystal enemies guard many sorceries and the path to Seath.

Suggested level: 50–60

Bonfires

The Duke's Archives
Duke's Archives Prison
Duke's Archives Balcony

Items found here

Crystal Straight Sword: Sold by Domhnall of Zena; rare drop from sword-wielding Crystal Hollow Soldiers in the Duke's Archives.
Channeler's Trident: Very rare drop from Channelers (respawning ones in the Duke's Archives).
Avelyn: In a chest on top of a bookshelf in the Duke's Archives, reached via the moving staircase.
Logan's Catalyst: Appears in a chest where Logan sat in the Archives once he leaves (after Seath and all his spells).
Tin Crystallization Catalyst: Dropped by the maddened Big Hat Logan in Seath's first arena in the Archives.
Six-Eyed Helm of the Channelers: In a chest in a side room of the Duke's Archives near the stairs down to the garden path.
Robe of the Channelers: In a chest in a side room of the Duke's Archives near the stairs down to the garden path.
Gauntlets of the Channelers: In a chest in a side room of the Duke's Archives near the stairs down to the garden path.
Waistcloth of the Channelers: In a chest in a side room of the Duke's Archives near the stairs down to the garden path.
Maiden Hood: On a corpse in the Duke's Archives.
Maiden Robe: On a corpse in the Duke's Archives.
Maiden Gloves: On a corpse in the Duke's Archives.
Maiden Skirt: On a corpse in the Duke's Archives.
Big Hat: Dropped by Big Hat Logan once he goes mad and turns hostile.
Sage Robe: In a chest in the Archives once Logan goes hollow; the Big Hat drops from Logan himself.
Traveling Boots: In a chest in the Archives once Logan goes hollow; the Big Hat drops from Logan himself.
White Seance Ring: After escaping the Archives prison, drop onto planks beside the exit ladder to a hidden room.
Homing Crystal Soulmass: Buy from Big Hat Logan in the Archives library for 30,000 after freeing him from his cell.
Crystal Soul Spear: Buy from Big Hat Logan in the Archives library for 50,000 after freeing him from his cell.
White Dragon Breath: Dropped by Big Hat Logan when he dies: finish his quest (he turns hostile in Seath's first arena) or kill him.
Crystal Magic Weapon: Buy from Big Hat Logan in the Archives library for 20,000 after freeing him from his cell.
Strong Magic Shield: Sits in a chest inside The Duke's Archives.
Soothing Sunlight: Guaranteed drop from a Pisaca in the Archives prison area opened by the Archive Tower Giant Cell Key.
Bountiful Sunlight: Guaranteed drop from another Pisaca in the same Archives prison area.
Archive Tower Cell Key: Dropped by the sleeping Man-Serpent near the Archives prison bonfire.
Archive Prison Extra Key: On a corpse below after dropping from one prison cell to the next.
Archive Tower Giant Door Key: In the chest behind the music box in the Archive Tower.
Archive Tower Giant Cell Key: In a chest at the bottom of the Archives, by the Crystal Cave exit.
Broken Pendant (Artorias of the Abyss): Drops from the Crystal Golem near the first Archives elevator once Dusk has been rescued.
Crystal Ember: Behind the bookshelves in the Archives room with stairs down to the gardens.
Large Magic Ember: In a chest in the Archives room where you first meet Seath, after killing him.
Fire Keeper Soul: In the Pisaca cell at the bottom of the Archives prison (needs the Archive Tower Giant Cell Key).

Walkthrough: The Duke's Archives

Kill the two Mecha Boars at the entrance and rest at The Duke's Archives bonfire.
Ride the first lift up and kill the Crystal Golem to get the Broken Pendant, the item that opens the DLC portal.
Clear the crystal hollows and the Channeler and pick up the soul.
Take the left-hand stairs and open the chest for Twinkling Titanite.
Circle round for Twinkling Titanite on the balcony and the Crystal Knight Shield from a mimic.
Ride up one floor and lure out the crystal hollow. A Crystal Lizard on the stairs drops two Twinkling Titanite if you are fast.
Wear a Rare Ring of Sacrifice and enter Seath the Scaleless's fog. You are meant to lose this fight.
Rest at the Duke's Archives Prison bonfire and kill the serpent guard for the Archive Tower Cell Key.
Leave your cell, try to kill the two serpent men that run past, then the four Pisacas chasing them.
Climb the stairs and ladder, edge left along the ledge and drop into a cell; it holds the Maiden Set and the White Seance Ring.
Dropping into the third cell gives the Archive Prison Extra Key, which opens the second cell for a soul.
At the bottom, two weeping Pisacas drop the Soothing Sunlight and Bountiful Sunlight miracles. Big Hat Logan is locked up nearby; talk to him.
Climb the ladder, kill the two serpent men, stop the alarm and open the chest for the Archive Tower Giant Door Key.
Return to your cell, open its other door, drop down for a soul and keep dropping back down to the alarm.
With the Giant Door Key, climb all the way back and unlock the door above the ladder.
Beyond it, one Channeler stands on a ledge and another waits around the bend; kill both.
Head left, rotate the staircase, go down for Twinkling Titanite in a chest and come back up.
Top up your health, then drop onto the second rotating staircase.
Climb those stairs for the Strong Magic Shield sorcery.
Spin the stairs, descend, kill the archer on the ledge and slide down the ladder. A lever there opens the bookcase shortcut.
In the larger room, take the Symbol of Avarice from a mimic and the enchanted Falchion from another mimic in the far right corner.
The remaining chests, including one hidden behind a bookcase, give the Channeler Set, the Archive Tower Giant Cell Key and the Crystal Ember.
In the smaller room, open the chest for a Blue Titanite Chunk.
Slip out through the bookcase and light the Duke's Archives Balcony bonfire.
Clear both library rooms, including the archer on top of the shelves and the Channelers.
Rotate the staircase and jump from its lower steps onto the bookshelf while it turns to reach the chest with Avelyn.
In the big room a lever lowers the stairs. Grab the Prism Stones from the chest there before heading through the fog gate.
A Golden Crystal Golem in the garden holds Sieglinde of Catarina; break it and agree when she asks her question.
The remaining Crystal Golems guard the Crystalline Set and a Blue Titanite Chunk.
From the garden, descend into the Crystal Cave.

Walkthrough: Crystal Cave

The first hidden bridge leads to a Humanity.
A second hidden bridge leads to a Crystal Golem. Beyond it, drop left and go back into the little tunnel to catch three Crystal Lizards.
From there, another unseen path slopes down to the Blue Titanite Slab.
Up again, a Golden Crystal Golem guards a Blue Titanite Chunk.
Take the last invisible path to the soul in front of a Moonlight Butterfly; it will usually attack you.
The Man-Eater Shells drop Purging Stones and Twinkling Titanite; the Covetous Gold Serpent Ring improves your odds.
Defeat Seath the Scaleless.
Destroy the Primordial Crystal behind him first; until then he cannot be hurt.
His long tail can be severed for the Moonlight Greatsword.
Optional co-op around levels 60–75.
Go back to the balcony bonfire, through the bookcase shortcut and into the small room to talk to Big Hat Logan and buy sorceries.
For Big Hat's Set, buy all of his sorceries so he leaves and goes hollow.
Need only the White Dragon Breath sorcery, the Big Hat and the Tin Crystallization Catalyst? Then killing him right away is fine.
After he leaves, find him hollow in the room where you first met Seath, kill him and come back to this room for Big Hat's Set in a new chest.
Climb back up the ladder, rotate the stairs, go out to the balcony and back into the prison tower.
Go to the very bottom and open the gate with the Archive Tower Giant Cell Key for a Fire Keeper Soul.
Back in the Archives, the first archive room on the second floor has a lever that summons the elevator; pull it.
In the room where you first met Seath, open the chest for the Large Magic Ember and grab the soul on the balcony.
Warp to Firelink Shrine, talk to Sieglinde of Catarina (answer yes) and go down to reinforce your Estus Flask.
Go to New Londo Ruins and give the Large Magic Ember to Rickert of Vinheim.
Warp to the Chamber of the Princess and give the Crystal Ember to the Giant Blacksmith.
Next stop is the Demon Ruins: warp to the Daughter of Chaos bonfire, descend and light the first bonfire you reach.