KatanaChanged in 3 patchesVerified on build 25080141

Serpentbone Blade

With its requirements met (Str 11 · Dex 22), Serpentbone Blade reaches 401 attack rating at +25.

Attack rating (+25): 401
Scaling (+25): Str E · Dex B
Class: Katana
Weight: 6
Requires: Str 11 · Dex 22
Skill: Double Slash · FP 3
Passive: Causes poison buildup (66)
Upgrades with: Smithing Stones (+25)

Attack rating by affinity 1

At Str 11 · Dex 22 · Int 10 · Fai 10 · Arc 10 (each stat at the weapon's requirement, 10 where it has none), one-handed.

Affinity	+0	Max	Damage at max	Scaling at max
Standard	149	401 +25	Physical 401	Str EDex BInt –Fai –Arc –

Try your own stats, two-handing and any upgrade in the AR calculator.

Dexterity scaling (Standard, +25)

Soft caps at 60, 80: the breakpoints of this weapon's scaling curve, where each point of Dexterity starts adding a different amount. Other stats stay at the requirement.

By upgrade level (Standard)

Level	AR	Physical	Cost
+0	149	149	—
+1	158	158	Smithing Stone [1] × 2
+2	167	167	Smithing Stone [1] × 4
+3	177	177	Smithing Stone [1] × 6
+4	186	186	Smithing Stone [2] × 2
+5	196	196	Smithing Stone [2] × 4
+6	205	205	Smithing Stone [2] × 6
+7	215	215	Smithing Stone [3] × 2
+8	225	225	Smithing Stone [3] × 4
+9	235	235	Smithing Stone [3] × 6
+10	244	244	Smithing Stone [4] × 2
+11	254	254	Smithing Stone [4] × 4
+12	264	264	Smithing Stone [4] × 6
+13	274	274	Smithing Stone [5] × 2
+14	285	285	Smithing Stone [5] × 4
+15	295	295	Smithing Stone [5] × 6
+16	305	305	Smithing Stone [6] × 2
+17	315	315	Smithing Stone [6] × 4
+18	326	326	Smithing Stone [6] × 6
+19	336	336	Smithing Stone [7] × 2
+20	347	347	Smithing Stone [7] × 4
+21	358	358	Smithing Stone [7] × 6
+22	368	368	Smithing Stone [8] × 2
+23	379	379	Smithing Stone [8] × 4
+24	390	390	Smithing Stone [8] × 6
+25	401	401	Ancient Dragon Smithing Stone × 1

From +0 to +25: 12 Smithing Stone [1], 12 Smithing Stone [2], 12 Smithing Stone [3], 12 Smithing Stone [4], 12 Smithing Stone [5], 12 Smithing Stone [6], 12 Smithing Stone [7], 12 Smithing Stone [8], 1 Ancient Dragon Smithing Stone.

Where to find Serpentbone Blade

Given by an event or quest

Event or quest reward

Patch history 3

Every patch that changed its numbers, read from the game's balance file (regulation) of each version.

1.04.1from 1.03.3
Every changed value (1)
Value Before to After Change
Defence and poise 1
Guard Stamina Multiplier×3 variants 0 1 +1
1.09from 1.08.1
- Passive effect 1107,500→6,510
- Passive effect 26,510→107,500
1.12.1from 1.10
Every changed value (1)
Value Before to After Change
Health, stamina and weight 1
Weapon Regain HP Amount 40 60 +20+50%

Value	Before	to	After	Change
Defence and poise 1
Guard Stamina Multiplier×3 variants	0	→	1	+1

Value	Before	to	After	Change
Health, stamina and weight 1
Weapon Regain HP Amount	40	→	60	+20+50%

Other katanas with similar AR

Overview

Class: Katana
Weight: 6
Requires: Str 11 · Dex 22
Affinities: Standard
Game ID: 9080000