Serpentbone Blade

Serpentbone Blade
Attack	120 Physical
Critical	100
Scaling	Str E, Dex C
Requires	Str 11, Dex 22
Effect	Inflicts Poison buildup (66)
Guard	45% physical, 30 guard boost
Type	Katana
Attack Type	Slash / Pierce
Skill	Double Slash
FP Cost	6 / 3 / 3
Weight	6
Upgrades With	Smithing Stones, to +25
Sell Price	200

The Serpentbone Blade is a Katana in Elden Ring. It has the highest physical attack of any katana in the game. It becomes available partway through a run, in Volcano Manor.

The Serpentbone Blade is a sinister katana modeled after a serpent bone, its densely packed row of spines coated in lethal poison. Tanith, the Volcano Manor proprietress, gives it as the reward for the request to slay Rileigh the Idle. Its heavy attack is a double slash, shared with the Sword of Night, and charging it makes the wielder step well forward, closing distance, while both hits count as one stack for successive-attack effects. It inflicts 66 poison buildup and scales C in Dexterity at 6 weight. It suits a Dexterity character who wants poison, often power stanced with a bleed katana.

Why Players Pick It

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The Serpentbone Blade has the highest physical attack among katanas at 120 at +0, and it is the only poison katana, with 66 buildup that helps against anything resisting bleed. Double Slash is its skill, backed by C Dexterity scaling. It cannot be infused, but it tops the class at 294 physical when fully upgraded.

How to Get Serpentbone Blade Guide

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Tanith gives it at Volcano Manor as the reward for the second assassination request, the killing of Rileigh the Idle.

1. Reach Volcano Manor on Mt. Gelmir and accept Tanith's offer to join, receiving the Drawing-Room Key.
2. Read the first letter in the drawing room and invade Old Knight Istvan in Stormhill.
3. After Istvan falls, reload the area and take the second letter from the table in Recusant Bernahl's room.
4. Invade Rileigh the Idle through his red sign in the Altus Plateau and defeat him.
5. Return to Tanith to receive the Serpentbone Blade.

Where to find Serpentbone Blade Location?

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Serpentbone Blade map location:

Map credit by Map Genie.

Upgrades

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Regular Smithing Stones take it all the way to +25. Greases and weapon buffs work on it as well.

Level	Material	Amount	Attack	Scaling
+1	Smithing Stone [1]	x2	126 Physical	Str E, Dex C
+2	Smithing Stone [1]	x4	133 Physical	Str E, Dex C
+3	Smithing Stone [1]	x6	140 Physical	Str E, Dex C
+4	Smithing Stone [2]	x2	147 Physical	Str E, Dex C
+5	Smithing Stone [2]	x4	154 Physical	Str E, Dex C
+6	Smithing Stone [2]	x6	161 Physical	Str E, Dex C
+7	Smithing Stone [3]	x2	168 Physical	Str E, Dex C
+8	Smithing Stone [3]	x4	175 Physical	Str E, Dex C
+9	Smithing Stone [3]	x6	182 Physical	Str E, Dex C
+10	Smithing Stone [4]	x2	189 Physical	Str E, Dex C
+11	Smithing Stone [4]	x4	196 Physical	Str E, Dex B
+12	Smithing Stone [4]	x6	203 Physical	Str E, Dex B
+13	Smithing Stone [5]	x2	210 Physical	Str E, Dex B
+14	Smithing Stone [5]	x4	217 Physical	Str E, Dex B
+15	Smithing Stone [5]	x6	224 Physical	Str E, Dex B
+16	Smithing Stone [6]	x2	231 Physical	Str E, Dex B
+17	Smithing Stone [6]	x4	238 Physical	Str E, Dex B
+18	Smithing Stone [6]	x6	245 Physical	Str E, Dex B
+19	Smithing Stone [7]	x2	252 Physical	Str E, Dex B
+20	Smithing Stone [7]	x4	259 Physical	Str E, Dex B
+21	Smithing Stone [7]	x6	266 Physical	Str E, Dex B
+22	Smithing Stone [8]	x2	273 Physical	Str E, Dex B
+23	Smithing Stone [8]	x4	280 Physical	Str E, Dex B
+24	Smithing Stone [8]	x6	287 Physical	Str E, Dex B
+25	Ancient Dragon Smithing Stone	x1	294 Physical	Str E, Dex B

Skill

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Double Slash costs 6 / 3 / 3 FP. The wielder performs a crossing double slash from a low stance, and repeated inputs add a spinning flurry of three slashes and then a heavy overhead finisher. Every slash can be parried, and each hit uses stamina separately, so the full chain is costly. Greatswords, halberds and other large weapons use a slower version with longer gaps between inputs.

"Skill of superior swordsmen. Perform a crossing slash attack from a low stance. Repeated inputs allow for up to two follow-up attacks."

Build

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Dual wielded with a Poison Uchigatana: poison procs and repeated strikes stack attack buffs, while one-handed charged heavies stagger tough enemies in about two uses.

Stats	Dexterity to 60, then 80, Vigor 50, Mind 20, Endurance 24, Strength 18
Affinity	Cannot be infused; it keeps its own scaling.
Talismans	Kindred of Rot's Exultation, Millicent's Prosthesis, Winged Sword Insignia, Shard of Alexander
Pairs With	Uchigatana, Mushroom Crown, Poisoned Hand

All Katanas

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Name	Image	Physical	Magic	Fire	Light	Holy	Crit. Boost	Weight	Str.	Dex.	Int.	Fai.	Arc.	Sell Price	Skill
Dragonscale Blade		110 35	0 25	0 25	0 50	0 25	100 30	5.5	D 12	C 20	0	0	0	500	Ice Lightning Sword
Hand of Malenia		117 49	0 33	0 33	0 33	0 33	100 33	7	E 16	C 48	0	0	0	1000	Waterfowl Dance
Meteoric Ore Blade		112 50	72 45	0 31	0 31	0 31	100 33	7.5	D 15	E 14	D 18	0	0	500	Gravitas
Moonveil		73 31	87 57	0 26	0 26	0 26	100 31	6.5	E 12	D 18	C 23	0	0	500	Transient Moonlight
Nagakiba		115 49	0 33	0 33	0 33	0 33	100 33	7	D 18	C 22	0	0	0	100	Unsheathe
Rivers of Blood		76 36	0 26	76 52	0 26	0 26	100 31	6.5	E 12	D 18	0	0	D 20	500	Corpse Piler
Serpentbone Blade		120 45	0 30	0 30	0 30	0 30	100 30	6	E 11	C 22	0	0	0	200	Double Slash
Star-Lined Sword		82 34.0	82 48.0	0 24.0	0 24.0	0 24.0	100 29	5.0	E 10	C 23	D 21	0	0	500	Onze's Line of Stars
Sword of Night		110 43.0	33 35.0	0 27.0	0 27.0	0 27.0	100 30	6.5	11	C 20	0	0	0	0	Witching Hour Slash
Uchigatana		115 45.0	0 30.0	0 30.0	0 30.0	0 30.0	100 30	5.5	D 11	D 15	0	0	0	100	Unsheathe

Notes

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"Sinister katana modeled after a serpent bone. The densely packed row of spines that jut away from the cutting edge are coated in a lethal poison."