Yellow Backbone Bloodborne Wiki » Upgrades » Ritual Materials » Yellow Backbone

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Basic Information

Icon	Name	Used in	No. Held	Stored	Notes
	Yellow Backbone	● Pthumeru Ihyll Root Chalice (Rotted) ● Lower Ailing Loran Root Chalice (Rotted) ● Isz Root Chalice (Rotted)	- / 99	- / 600	Special material used in a Holy Chalice ritual.

Yellow Backbone ❘ 黄色い背骨	Ritual Material

In-Game Description Special material used in a Holy Chalice rite. Special body parts collected by the Healing Church. What was this gruesome bait used to lure? The additional rite Rotted Offering beckons ungodly forces, normally terrifying things, but also worthy prey for a special hunt. Note: The same in-game description in US & UK versions. ✓ Overview Conducting a ritual to create a Chalice Dungeon is fairly straightforward; when you've got a Chalice and the required ritual materials, approach a Chalice altar and select the Chalice Ritual option. In the Chalice Ritual menu you'll see the list of all your collected chalices in the large window on the left of your screen. Along the top of this window are four tabs, one for each class of Chalice, which affects the area that labyrinth will be set in. The central window shows the details of the ritual, including the Depth of the created dungeon, which is essentially the difficulty level, with 1 being the lowest and 5 being the maximum. The depth affects the required level for certain Basic and Rite Materials. For example, Depth 2 labyrinths will require Ritual Blood (2) and Tomb Mold (2), which can be acquired from the corresponding depth labyrinths or from certain chests and enemies from the previous Depth. The cost in Blood Echoes is also shown, along with the required materials, both for the ritual and any possible Additional Rites. If you have all of the required materials and are certain you want to use them, select the Conduct Ritual option to create the dungeon. Basic and Rite crafting materials can be found mainly in the Chalice Labyrinths from loot chests or enemy drops, with the rarer ones required to craft specific labyrinths also found in the main quest. Progressing though the game, acquiring Hunter Badges, defeating bosses and clearing labyrinths will also unlock certain Basic Materials in both Bath Messenger Blood Echoes and Insight shops in the Hunter's Dream. Ritual Blood and Tomb Mold basic materials have a numerical value in brackets next to them. These correspond to the depth/difficulty of a labyrinth, and can also be found on the same depth or one depth below. The highest level of both of these items (5), can be purchased from the Bath Messengers since Patch v1.07 (available on NG+). When using a Root Chalice to create randomly generated dungeons you'll usually have the possibility to conduct Additional Rites, at the cost of more materials. These rites add effects that can drastically change the conditions within each dungeon, usually making them much more challenging. They do carry some reward, however, usually in the form of increased item drops and Blood Echoes. There are four possible Additional Rites: Fetid Offering, Rotted Offering, Curse & Sinister Bell. Effects Yellow Backbone is used to create additional rite "Rotted offering" for depth 5 root chalice dungeons. This rite triggers one of, or a combination of, the following difficulty-increasing effects: The Eye Collector appears and summons Mad Ones. Tomb Prospector Hunters often appear as enemies. The Labyrinth Ritekeeper appears. It will patrol large rooms, gather other enemies around it and then strengthen them. Even when the Ritekeeper is killed, the enemies will retain their powered-up status. It also increases the chance of getting very powerful Blood Gem effects, but this comes at the cost of strong negative effects. Use Pthumeru Ihyll Root Chalice Rite materials required: Yellow Backbone x6 To conduct additional rite: Rotted offering. Isz Root Chalice Rite materials required: Yellow Backbone x6 To conduct additional rite: Rotted offering. Lower Ailing Loran Root Chalice Rite materials required: Yellow Backbone x6 To conduct additional rite: Rotted offering. Availability (more details in the table below) Treasure in (Main Story): Nightmare of Mensis [x2] Treasure in (Preset Dungeons): Isz Gravestone [x3], Pthumeru Ihyll [x4] Treasure (available) in (Root Dungeons): Pthumeru Ihyll [Layer 2-4], Sinister Pthumeru Ihyll [Layer 2-3], Isz Gravestone [Layer 2-4], Sinister Isz Gravestone [Layer 2-3] Dropped by (Main Story): The One Reborn Dropped by (Preset Dungeons): Labyrinth Warrior (Crossbow & Sword), Labyrinth Warrior (Sword & Shield), Labyrinth Warrior (Greatsword) Dropped by (Root Dungeons): Labyrinth Warrior (Greatsword), Labyrinth Warrior (Crossbow & Sword), Labyrinth Warrior (Morning Star), Labyrinth Warrior (Sword & Shield) Sold by: Insight Bath Messengers [Hunter's Dream] Notes Available for purchase in NG+. Patch v1.07 added Yellow Backbone for purchase in Insight Bath Messengers Shop. In-game description was slightly different on version 1.0 than what there is now on version 1.09. [image]

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Merchants

Shop	Buy (Day)	(Evening)	(Night)	(Red Moon)	(NG+)	Sell	Requirement
Bath Messengers [Hunter's Dream]	-	-	-	-	-	1200	None
Insight Bath Messengers [Hunter's Dream]	3	3	3	3	3	-	NG+
Chalice Bath Messengers [Chalice Dungeons Common]	-	-	-	-	-	-	None
Patches, the Spider [Chalice Dungeons Rare]	-	-	-	-	-	-	None

Availability: Treasures & Item Drops

There are none Yellow Backbone treasures in The Old Hunters DLC and none item drops from enemies in The Old Hunters DLC.

Treasures in Main Story [All]
Nightmare of Mensis, total number of treasures in area x2, [complete map]
Yellow Backbone x2, chest on left side of the Library in Mergo's Loft: Entrance.

Treasures in Preset Dungeons [All]
Isz Gravestone L3, total number of treasures in area x3, [complete map]
Yellow Backbone x3, room with locked doors on Upper Floors.
Pthumeru Ihyll L2, total number of treasures in area x2, [complete map]
Yellow Backbone x2, treasure room behind trap on Upper Floors in side area before layer boss.
Pthumeru Ihyll L3, total number of treasures in area x2, [complete map]
Yellow Backbone x2, room on the other side of balconies on Upper Floors in side area before layer lamp.

Treasures in Root Dungeons [All]
Pthumeru Ihyll, possible treasure on layers 2, 3 and 4.
Sinister Pthumeru Ihyll, possible treasure on layers 2 and 3.
Isz Gravestone, possible treasure on layers 2, 3 and 4.
Sinister Isz Gravestone, possible treasure on layers 2 and 3.

Item Drop Main Story [% Drop Rate] [All]
Yahar'gul, Unseen Village (Blood Moon), total number of item drop from enemies (boss) in area x1
The One Reborn: Yellow Backbone x3 [100%]

Item Drop in Preset Dungeons [% Drop Rate] [All]
Pthumeru Ihyll L2, total number of item drop from enemies in area x1
Labyrinth Warrior (Crossbow & Sword): Yellow Backbone x1 [15%]
Pthumeru Ihyll L3, total number of item drop from enemies in area x2
Labyrinth Warrior (Sword & Shield): Yellow Backbone x1 [15%]
Labyrinth Warrior (Greatsword): Yellow Backbone x1 [15%]

Item Drop in Root Dungeons [% Drop Rate]
Root Dungeons, total number of item drop from enemies exclusive to Root Dungeons x4
Labyrinth Warrior (Greatsword): Inflicted Organ Pool x1 [15%]
Labyrinth Warrior (Crossbow & Sword): Inflicted Organ Pool x1 [15%]
Labyrinth Warrior (Morning Star): Inflicted Organ Pool x1 [15%]
Labyrinth Warrior (Sword & Shield): Inflicted Organ Pool x1 [15%]

Yellow Backbone: Drop Pools

For the most part, items dropped by enemies are decided simply by a random per cent chance from that enemy's own list of potential items. When an enemy appears in a dungeon, it sometimes has one or more of its drops determined by the dungeon's Depth, in order to give better rewards for more challenging dungeons. Such items are selected from a pool of similar items, and these pools are shown here. The upshot of this is that an enemy might drop a Tomb Mold (1) in the Depth 1 Pthumerian Root Labyrinth, but would drop a Tomb Mold (5) instead in a Depth 5 Isz Gravestone dungeon.

Pool Name	Depth 1		Depth 2		Depth 3		Depth 4		Depth 5
Inflicted Organ Pool		Blood Vial Depth 1		Blood Vial Depth 2		Inflicted Organ Depth 3		Inflicted Organ Depth 4		Yellow Backbone Depth 5

Enemies List Per Pool [% Drop Rate]
Inflicted Organ Pool
Labyrinth Warrior (Crossbow & Sword): x1 [15%]
Labyrinth Warrior (Greatsword): x1 [15%]
Labyrinth Warrior (Morning Star): x1 [15%]
Labyrinth Warrior (Sword & Shield): x1 [15%]

Chalice Dungeons Depth [Preset & Root]
Depth 1 (Preset) Pthumerian Labyrinth & (Root) Pthumerian Labyrinth
Depth 2 (Preset) Central Pthumerian Labyrinth, Hintertomb Labyrinth & (Root) Central Pthumerian Labyrinth, Hintertomb
Depth 3 (Preset) Lower Pthumerian Labyrinth, Lower Hintertomb Labyrinth & (Root) Lower Pthumerian Labyrinth, Sinister Lower Pthumerian Labyrinth, Lower Hintertomb, Sinister Hintertomb
Depth 4 (Preset) Cursed Pthumerian Defilement, Ailing Loran & (Root) Pthumerian Defilement, Ailing Loran
Depth 5 (Preset) Pthumeru Ihyll, Lower Loran, Isz Gravestone & (Root) Pthumeru Ihyll, Sinister Pthumeru Ihyll, Lower Loran, Sinister Lower Loran, Isz Gravestone, Sinister Isz Gravestone