Weaponsupporting

Serpent-Bone Blade

Serpentbone Blade is a katana rewarded for completing Volcano Manor's second assassination request. It inflicts deadly poison and uses the fixed Double Slash skill for rapid buildup.

Importance

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Elden Ring · weapon

Key Takeaways

Serpent-Bone Blade is a poison-focused katana whose fixed skill and upgrade path make it a specialized alternative to customizable katanas.

Poison-focused katana

Its defining feature is innate poison buildup, giving repeated attacks a status-oriented role rather than relying only on physical damage.

Fixed weapon skill

The blade comes with Double Slash as its weapon skill. Its skill cannot be replaced with another Ash of War, so the weapon’s moveset and skill choice are closely tied together.

Volcano Manor reward

It is obtained from Tanith after completing the second Volcano Manor assassination request, making it dependent on that questline’s progression rather than a world pickup or ordinary enemy drop.

Strongest in sustained pressure

Its poison buildup and rapid katana attacks make it most useful when repeated hits can be maintained long enough to trigger the status effect.

Limited customization

The blade cannot be infused, given a different Ash of War, or enhanced with weapon buffs, limiting build flexibility compared with standard infusable katanas.

Somber upgrade path

Serpent-Bone Blade uses the special-weapon reinforcement path and is upgraded with Somber Smithing Stones rather than the standard Smithing Stone sequence.

Overview

Serpent-Bone Blade is a unique katana in Elden Ring that trades the usual bleed focus of many katana builds for innate poison and a fixed Double Slash weapon skill.

The Serpent-Bone Blade is a base-game katana with a distinctive poison-oriented identity. Its role is sustained close-range pressure: repeated attacks can build Poison while the katana moveset supplies fast slashes and familiar spacing tools. It is a unique weapon rather than a normal katana that can be freely customized, so its defining behaviour comes from the weapon itself rather than from selecting an Ash of War or affinity.

Compared with the Uchigatana and other standard katanas, the Serpent-Bone Blade is less flexible. Its innate poison gives it a different status profile from the bleed commonly associated with the class, while its fixed Double Slash skill shapes how its skill attacks are used. The trade-off is that it does not serve as a general-purpose blank weapon for experimenting with alternate affinities or skills.

The blade occupies a useful middle point in progression: it becomes available through the Volcano Manor questline rather than through the opening areas, but it does not require Shadow of the Erdtree. Its acquisition context makes it a practical option for characters already pursuing a poison or status-focused approach, while its unique upgrade path means it should be evaluated as a finished weapon concept rather than as a base for extensive customization.

Serpent-Bone Blade suits players who want katana speed with a poison angle and who are comfortable committing to its fixed skill and weapon properties. It is not automatically a replacement for bleed-focused katanas, longer alternatives such as the Nagakiba, or ordinary infusible weapons; the relevant choice depends on whether poison buildup and the weapon's preset skill are more valuable than reach, affinity control, or a different status plan.

Statistics

Elden Ring publishes no 0–100 stat bars, so this page lists the verified requirements, scaling and handling figures instead. Taken from the project's verified weapons database, not from generated text.

Category
Katanas
Damage Type
Slash/Poison
Primary Scaling
Dex C
Weight
5
Skill
Ash of War (varies)
Str Req
11
Dex Req
20
How to Obtain
Rare drop, Deathbird locations

Figures verified against Consolidated Game Weapons Database.

Compared to similar katanas

Weapon	Str Req	Dex Req	Weight	Primary Scaling
Serpent-Bone Blade	11	20	5	Dex C
Nagakiba	12	18	5	Dex C
Meteoric Ore Blade	11	20	5.5	Dex C / Int D
Dragonscale Blade	11	16	4.5	Dex C
Dancing Blade of Ranah	8	22	5.5	Dex C

Requirements, scaling grades and weight are the game’s own published figures. From Consolidated Game Weapons Database.

How to Obtain

Before you start

Join Volcano Manor and complete its first assassination request.
Do not defeat Rykard, Lord of Blasphemy before completing the contract, because doing so ends the manor's assassination requests.
No DLC, New Game Plus, vendor, or additional boss requirement is needed.

01Reach Volcano Manor in Mt. Gelmir, join Tanith, and obtain the Drawing Room key. Take the first assassination letter from the drawing room and complete that contract before proceeding.
02After the first contract, collect the second red letter from the drawing room. It names Rileigh the Idle, whose invasion sign is in Altus Plateau near the Bridge of Iniquity Site of Grace.
03Use the sign to invade and defeat Rileigh the Idle. The assassination is a guaranteed contract objective, not a random enemy drop.
04Return to Volcano Manor and speak with Tanith after the contract is complete. She gives the Serpent-Bone Blade as the guaranteed reward; it is a unique, one-per-playthrough reward with no alternate base-game acquisition route.

Availability

Elden Ring base game — standard playthroughAvailable

Requires Volcano Manor quest progression

The Serpent-Bone Blade is part of the base-game Volcano Manor content; it is not Shadow of the Erdtree-exclusive and has no separate difficulty or vendor-stock availability.

Mechanics and Handling

Serpent-Bone Blade uses the katana family’s close-range, slash-focused moveset. Its ordinary attacks are quick enough to pressure nearby targets, but the blade is most effective when its wielder maintains spacing rather than trading through long recovery animations. The weapon’s reach supports lateral positioning and repeated status application, while its narrow melee focus makes missed swings costly against evasive or highly mobile enemies.

Deadly Poison application

The blade’s defining property is its innate Deadly Poison buildup. This is a distinct, more potent poison effect that lasts for less time than ordinary Poison, so the weapon rewards repeated contact but does not provide the same long-duration damage pattern as a conventional poison setup. The buildup is attached to the weapon’s attacks rather than requiring a separate coating, and the effect remains central to its handling even when raw damage is not the immediate priority.

Double Slash weapon skill

Serpent-Bone Blade has the fixed Double Slash skill rather than a freely interchangeable Ash of War. The skill begins with a spinning slash and can be extended with its follow-up input into another spinning attack. Its value comes from converting a brief opening into several close-range hits, which can help pressure an enemy’s status buildup, but the additional animation also commits the wielder in place. Use it when the target is staggered, recovering, or otherwise unlikely to punish the continuation; it is less reliable as an opener against an enemy that can interrupt or evade the sequence.

Handling limitations

The blade is an attack weapon rather than a defensive tool: it does not replace a shield’s blocking or parrying role, and its poison effect does not remove the need to manage enemy reach and attack timing. Its fixed skill also means that players cannot reshape the weapon around a different Ash of War or affinity. That commitment gives Serpent-Bone Blade a clear identity—fast katana pressure combined with short-duration Deadly Poison—while limiting its flexibility compared with customizable katanas.

Upgrades and Variants

Strengths, Weaknesses and Best Uses

Strengths

Innate poison buildup gives its regular attacks a status-focused role without requiring an affinity change or external coating.
Its katana moveset supplies quick successive attacks, giving repeated hits more opportunities to apply poison than slower melee classes.
Double Slash provides a dedicated multi-hit weapon skill, allowing short-range burst and additional status pressure when the opening is safe.
As a unique Somber weapon, its progression is straightforward and does not require choosing an Ash of War or affinity.

Weaknesses

It lacks the bleed buildup associated with many other katanas, so it cannot fill the same bleed-focused role without relying on separate sources of status.
Poison is a poor damage plan against enemies that resist or are immune to it, reducing the value of its defining passive in those matchups.
Its fixed weapon skill and non-infusable nature limit customization compared with ordinary katanas that can change Ashes of War and affinities.
Double Slash requires close range and commitment to multiple attacks, making it vulnerable when an enemy can punish sustained melee pressure.

Best uses

Poison-oriented PvE setups that want a fast katana rather than a slower dedicated poison weapon.
Encounters against enemies susceptible to poison, where repeated katana strikes can build the status while retaining normal melee pressure.
Players who want a ready-to-use unique katana with a fixed skill and a simpler Somber upgrade path.
Short openings where Double Slash can land multiple hits without requiring a long attack sequence.

Compared With Similar Weapons

Compared With Similar Weapons
Weapon	Class and role	Status / skill identity	Customization and trade-off
Serpent-Bone Blade	Innate poison buildup; fixed Double Slash skill	Cannot change its Ash of War or affinity; offers a dedicated poison option with katana reach	—
Uchigatana	Innate blood loss; versatile default skill and moveset	Can change Ashes of War and affinities; better suited to builds that want customization rather than fixed poison	—
Nagakiba	Innate blood loss; long-reach katana moveset	Infusable and skill-customizable; trades the Serpent-Bone Blade's poison identity for greater spacing flexibility	—
Venomous Fang	Innate poison buildup; claw attacks and Quickstep-based handling	Can be customized with Ashes of War and affinities; shorter reach, but better suited to aggressive paired-claw play	—

Lore and Design

The Serpent-Bone Blade’s item description identifies it as a katana fashioned from the bones of a giant serpent and coated in poison. This gives the weapon a clear thematic identity, but the description does not establish a named serpent, maker, or broader historical lineage. Its poisonous construction is presented as part of the weapon’s nature rather than as a separate character- or faction-specific enchantment.

Its story context comes from Volcano Manor. Tanith awards the blade after the assassination request involving Rileigh the Idle, placing it within the manor’s contract-driven narrative and its serpent-centered imagery. That connection supports an association with Volcano Manor’s storyline, but does not by itself prove that the blade was forged by the manor, belonged to Rykard, or was used by a particular faction before the player obtains it.