Dark Souls How to Get Cell Key Easy

Key Items designed to open doors, or grant passage to certain areas when they are held.

Icon & Name	Found Location	Unlocks Location	MK
Master Key	Gotten by choosing it as a gift, or the thief class, at the start of the game. Buy it for 5,000 souls from Domhnall of Zena  after he moves under the bridge by Firelink Shrine.	Unlocks many locks in the early areas. See which locks it opens in the MK section to the right, or on the Master Key page.	MK
Dungeon Cell Key	Northern Undead Asylum. On corpse dropped into cell.	Northern Undead Asylum. Cell door.	No
Undead Asylum F2 East Key	Undead Asylum. Gift from half dead knight.	Undead Asylum. Door behind boulder trap.	No
Undead Asylum F2 West Key	Firelink Shrine. Roof of building flooded with water. Accessible after unlocking lift to Undead Church.	Undead Asylum. Open the door guarded by Elite Undead, leads to Rusted Iron Ring.	No
Big Pilgrim's Key	Dropped by Asylum Demon.	Undead Asylum. Exit Asylum.	No
Residence Key	Undead Burg. Bought from Undead Merchant.	Access 3x Gold Pine Resin in a residence in Undead Burg.	Yes
		Frees Griggs of Vinheim in Lower Undead Burg.	No
Mystery Key	Found behind the first ladder (after armored boar) in Undead Parish.	Frees Lautrec. Behind a breakable door, on the second floor of the Undead Church.	Yes
Basement Key	Found on steps to Undead Church, right behind the big gate.	Unlocks small door at the start of the Hellkite bridge, leading to the Lower Undead Burg	No
Key to Depths	Lower Undead Burg. Dropped by Capra Demon.	Unlocks door to the Depths. Go down stairs by the Capra location, the door is at the bottom of the tower by two thiefs.	No
Sewer Chamber Key	Depths. On a corpse in the room with the giant rat. The key is also accessible from the other side of the iron bars.	Unlocks Bonfire room in the first slime-hallway in Depths.	Yes
Blighttown Key	Depths. Dropped by Gaping Dragon.	Unlocks Blighttown. Huge doors beside Domhnall of Zena (sewer merchant) in Depths.	No
Watchtower Basement Key	Darkroot Garden. On top of the tower, after crossing the Moonlight Butterfly bridge.	Unlock shortcut between Undead Burg and Darkroot Basin, guarded by Havel.	Yes
Key to New Londo Ruins	Blighttown. In Chest at the end of the cave, when entering from Valley of Drakes.	Unlocks shortcut between New Londo Ruins and Valley of Drakes.	Yes
Key to the Seal	New Londo Ruins. Gift from Ingward after getting the Lordvessel. He will also drop it if killed.	Access lower New Londo, Valley of Drakes (2nd entrance) and The Abyss.	No
Cage Key	Sen's Fortress. At the bottom of the tower with Crestfallen Merchant. Jump across the broken bridge to access tower.	Unlocks hidden cages in Sen's Fortress. Free Logan and a Hero Soul	Yes
		Unlocks cage elevator in Sen's Fortress.	No
Archive Tower Cell Key	The Duke's Archives. Dropped by sleeping snake-head guard.	Opens prison in Archive Tower. Opens third door down from bonfire.	No
Archive Prison Extra Key	The Duke's Archives. Found on corpse after dropping down from cell 3 to 4.	Opens the other cell doors in Archive Tower. Also opens second door in the Bonfire cell, and shortcut to gramophone.	No
Archive Tower Giant Door Key	The Duke's Archives. Found in chest behind gramophone.	Exit Archive Tower.	No
Archive Tower Giant Cell Key	The Duke's Archives. Found in chest at bottom of Archives, by the exit to the Crystal Cave.	Opens cell behind the Pisacas. Free Big Hat Logan.	No
Annex Key	Found in dungeon in Painted World of Ariamis.	Opens Annex in Painted World. Get Dark Ember.	No
Crest of Artorias	Bought from Blacksmith Andre for 20,000 souls. Dropped by Blacksmith Andre	Opens the sealed gate within Darkroot Garden.	No
Peculiar Doll	Found inside jail cell, in the Undead Asylum, when returning.	Access Painted World of Ariamis.	No
Broken Pendant	Dropped by the Crystal Golem at the entrance to the Duke's Archives. Dusk of Oolacile must have been rescued for the Crystal Golem to appear. (AotA only)	Access Lost Oolacile from the Darkroot Basin.	No
Crest Key	Found inside a chest in Oolacile Township, near a lit fireplace. (AotA only)	Access Hawkeye Gough.	No

yarbroughancon1962.blogspot.com

Source: https://darksouls.wiki.fextralife.com/Keys