Sourcemined
Elden Ring
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KatanaChanged in 3 patchesVerified on build 25080141
Serpentbone Blade

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+0MaxDamage at maxScaling at max
Standard149401 +25Physical 401Str EDex BInt –Fai –Arc –

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

Attack rating by stat (Standard, +25)

400500600700112040608099Stat level6080
  • Dexterity
  • Strength
Each line raises one stat from the requirement to 99 with the others held at the requirement; dashed lines are Dexterity's soft caps.
Show the numbers
Stat levelDexterityStrength
11–401
14–403
17–405
20–407
22401–
23–409
25415–
26–411
28428–
29–413
31441–
32–414
34454–
35–416
37467–
38–418
40480–
41–419
43492–
44–421
46503–
47–423
49514–
50–424
52525–
53–425
55535–
56–427
58543–
59–428
61550–
62–429
64557–
65–430
67565–
68–431
70572–
71–432
73580–
74–433
76587–
77–434
79595–
80–435
82599–
83–435
85602–
86–435
88605–
89–436
91607–
92–436
94610–
95–436
97613–
98–437
99615437
StatSoft capsAR per point, by stretchAt 99
Dexterity60, 8022–60: +3.84 · 60–80: +2.5 · 80–99: +0.95615 from 401
Strength18, 60, 8011–18: +0.71 · 18–60: +0.52 · 60–80: +0.35 · 80–99: +0.11437 from 401

Soft caps are the breakpoints of the scaling curve the game assigns this weapon; past each one a point adds less (or, for some curves, more).

Attack rating by upgrade

02004006000510152025Upgrade level
At the weapon's requirements (Standard).
Show the numbers
Upgrade levelAttack rating
0149
1158
2167
3177
4186
5196
6205
7215
8225
9235
10244
11254
12264
13274
14285
15295
16305
17315
18326
19336
20347
21358
22368
23379
24390
25401

Poison 66 per hit at every upgrade level (Standard).

#7 of 10 katana weapons by attack rating

  1. Star-Lined Sword539 +10
  2. Hand of Malenia539 +10
  3. Moonveil538 +10
  4. Rivers of Blood512 +10
  5. Sword of Night471 +10
  6. Serpentbone Blade401 +25
  7. Nagakiba388 +25
  8. Dragonscale Blade372 +10
  9. Uchigatana347 +25
Standard affinity at max upgrade, each weapon at its own requirements. A full bar is the class's strongest (Meteoric Ore Blade, 550).

By upgrade level (Standard)

LevelARPhysicalCost
+0149149—
+1158158Smithing Stone [1] × 2
+2167167Smithing Stone [1] × 4
+3177177Smithing Stone [1] × 6
+4186186Smithing Stone [2] × 2
+5196196Smithing Stone [2] × 4
+6205205Smithing Stone [2] × 6
+7215215Smithing Stone [3] × 2
+8225225Smithing Stone [3] × 4
+9235235Smithing Stone [3] × 6
+10244244Smithing Stone [4] × 2
+11254254Smithing Stone [4] × 4
+12264264Smithing Stone [4] × 6
+13274274Smithing Stone [5] × 2
+14285285Smithing Stone [5] × 4
+15295295Smithing Stone [5] × 6
+16305305Smithing Stone [6] × 2
+17315315Smithing Stone [6] × 4
+18326326Smithing Stone [6] × 6
+19336336Smithing Stone [7] × 2
+20347347Smithing Stone [7] × 4
+21358358Smithing Stone [7] × 6
+22368368Smithing Stone [8] × 2
+23379379Smithing Stone [8] × 4
+24390390Smithing Stone [8] × 6
+25401401Ancient 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

Rewards

  • Event reward · Volcano Manor

Patch history 3

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

  1. 1.04.1from 1.03.3
      Every changed value (1)
      ValueBeforetoAfterChange
      Defence and poise 1
      Guard Stamina Multiplier×3 variants01+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)
        ValueBeforetoAfterChange
        Health, stamina and weight 1
        Weapon Regain HP Amount4060+20+50%

      Other katanas with similar AR

      Overview

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