New Londo Ruins

A drowned city haunted by ghosts that only cursed or Transient Curse users can hit. Draining it opens the way to the Four Kings.

Suggested level: 50–60

Items found here

Ghost Blade: Very rare drop from Banshees in New Londo Ruins (needs Transient Curse to hit them).
Parrying Dagger: On a corpse in the upper part of New Londo Ruins, near where the first Banshee floats.
Jagged Ghost Blade: Very rare drop from twin-blade ghosts in New Londo Ruins.
Composite Bow: On a ledge above the big gates of New Londo Ruins facing the Valley of Drakes.
Cursebite Ring: On a ledge at the back of Ingward's house in New Londo Ruins.
Resist Curse: Buy from Ingward in his tower in New Londo Ruins for 5,000 souls.
Key to the Seal: Given by Ingward once you have the Lordvessel, or dropped if you kill him.
Very Large Ember: After draining New Londo, climb the stairs near the Valley of Drakes side to the third floor.
Fire Keeper Soul: Beside the narrow wooden walkway in New Londo Ruins; ghosts appear when you grab it.

Walkthrough: Firelink Shrine

Light the bonfire for the Enkindle achievement and talk to the Crestfallen Warrior sitting near it.
Talk to Petrus of Thorolund for a Copper Coin. You may join the Way of White here if you like.
Around the shrine itself: souls, Humanity, Firebombs, Homeward Bones, a Morning Star, a Talisman, Cracked Red Eye Orbs and Lloyd's Talismans.
Sweep the graveyard for souls, the Zweihander, the Winged Spear, the Caduceus Round Shield and the Binoculars. Watch out for the skeletons.
Spend your souls, then take the stairs and elevator down to New Londo Ruins. Talk to Rickert of Vinheim in his cell and loot the souls, the Estoc and the Transient Curses nearby.
Make a brave run past the ghosts into the ruins to grab a Fire Keeper Soul.
Give the soul to Anastacia of Astora in the cell below the shrine to reinforce your Estus Flask.
On the Valley of Drakes bridge an Undead Dragon lies in wait. Sprint for the soul on the right, then Astora's Straight Sword and the Dragon Crest Shield.
Died there? Grab your souls, carry on down the valley and ride the lift up to the Darkroot Basin bonfire.
A Black Knight stands near the basin bonfire; it drops a Blue Titanite Chunk and guards the Grass Crest Shield.
Climb through the basin and collect the Hunter Set, the Longbow and its arrows, and kill the Crystal Lizard quickly before it flees.
Keep climbing to the Undead Parish, light the bonfire above Andre and ride the elevator back down as a shortcut to Firelink Shrine.
Pick up the Undead Asylum F2 West Key on the Firelink roof, then ride the crow back to the asylum to open the west door and loot the Rusted Iron Ring.
Heading up to the Undead Burg, check the arches below the aqueduct for souls and a Ring of Sacrifice.

Walkthrough: New Londo Ruins and The Abyss

Visit the Undead Merchant (Female) in the aqueduct, buy all her Transient Curses and put them in your item slots.
Head down to New Londo Ruins.
On the way to the wooden bridges, the now hollow Crestfallen Warrior attacks.
Use a Transient Curse and keep it on your item bar to see when it wears off.
In the first part of the ruins, grab the Parrying Dagger and kill the Banshee for two Transient Curses.
Go through the fog gate.
Kick the ladder down, climb down and kill the two ghosts below so they stop rising through the floor.
Ghosts surface from the water near the house; clear them before you go in.
Climb the ladder in the fireplace and talk to Ingward for the Key to the Seal; he sells more Transient Curses.
Downstairs, a ledge holds the Cursebite Ring.
The far door leads to a Green Titanite Shard and Humanity; a jump onto the roof reaches a Rare Ring of Sacrifice.
The Key to the Seal opens the flood tower. Turn its lever clockwise and the water drains away.
Climb the tower for the Composite Bow and large arrows.
A lever and lift bring you down to the gate on the Valley of Drakes side.
The drakes here guard the Bandit Set and the Spider Shield, and a ladder leads up to the Red Tearstone Ring.
Go through the buildings and the fog gate into the drained city.
Kill the Darkwraiths and the Mass of Souls, grab the Humanity and trigger the lift shortcut to the start of the ruins.
Up through the small side door is a chest holding the Very Large Ember.
Out through the big door below: souls and six Cracked Red Eye Orbs.
An illusory wall nearby hides a chest with a Titanite Chunk.
Clear the next Darkwraiths and Mass of Souls and open the chest for another Titanite Chunk.
Equip the Covenant of Artorias ring before going down.
Drop into The Abyss and defeat the Four Kings.
Witch Beatrice can be summoned behind a pillar if you summoned her for the Moonlight Butterfly.
Optional co-op around levels 60–75.
If you have not placed the Lordvessel through Frampt, talk to Darkstalker Kaathe in the Abyss. Joining the Darkwraith covenant gives the Dark Hand.
Andre of Astora can use the Very Large Ember; warp to the Undead Parish and upgrade.
With the kings gone, the Witch Set and Beatrice's Catalyst appear in the Valley of Drakes below Firelink Shrine.
Pack three or more Purple Moss Clumps, then warp to the Daughter of Chaos bonfire.
Siegmeyer of Catarina is now stranded in the Blighttown swamp; giving him the moss earns the Pierce Shield.
Behind the chest at the top of the big branch is an illusory wall; strike it to enter The Great Hollow.