Sourcemined
Elden Ring
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BossForbidden LandsChanged in 2 patchesVerified on build 25080141

Fell Twin

Fought in 2 places, from 6,539 HP to 7,871 HP at Forbidden Lands · Divine Tower of East Altus: Gate: each placement carries its own area scaling. It takes the most damage from Slash and the least from Holy.

HP (NG)
6,539–7,871
HP in NG+7
13,929
Stance
65
Weakest to
Slash -10%
Resists most
Holy 20%
Nearest grace
Divine Tower of East Altus: Gate

How Fell Twin fights

At Forbidden Lands · Divine Tower of East Altus: Gate, its toughest placement: 7,871 HP.

Phases by HP verified

90%
  • Its script checks its HP at 90% when it chooses what to do.

Attack choice by distance verified

Share of its picks per attack routine at each range, from its main weight tables (it switches between 2 sets of tables by state; one is shown). Routines are numbered as in its script.

  • Routine 24
  • Routine 4
  • Routine 1
  • Routine 42
  • Routine 6
  • Other
  • Right column: routines it can pick there
Show as a table
DistanceRoutinesMost likely picks
under 2 m7#24 93% · #5 2% · #21 2%
2–4 m9#24 92% · #1 2% · #6 2%
4–6 m9#24 91% · #1 2% · #4 2%
6–15 m3#24 93% · #4 4% · #42 4%
Attack routines
16
Walk in before attacking
18 from up to 15 m

What hurts it most

  1. Slash-10% +10%
  2. Standard0%
  3. Strike0% ±0
  4. Pierce0% ±0
  5. Magic0% ±0
  6. Fire0% ±0
  7. Lightning0% ±0
  8. Holy20% −20%

Negation (lower lets more through), and how much more or less damage that type deals than Standard does.

Status procs to kill it

Status1st procHP per procProcs to kill
Bleed2481,28175,009 buildup
Frost248817108,414 buildup
Poison2481,12675,009 buildup
Scarlet Rot2482,6253926 buildup

From full HP with that status alone; thresholds grow after each proc. Frostbite's extra 20% damage taken isn't counted.

Weapons that hit it hardest

Attack rating that gets through its negations at max upgrade with every stat at 50, best affinity per weapon (flat defense left out). Try your own build in the build planner →

  1. Anvil HammerStandard1,042 of 1,041 AR
  2. Bloodfiend's ArmFlame Art978 of 977 AR
  3. Royal GreatswordStandard961 of 961 AR
  4. Rellana's Twin BladesStandard956 of 954 AR
  5. Magma Wyrm's ScaleswordStandard943 of 885 AR
  6. Putrescence CleaverStandard941 of 869 AR

AI facts are read from the boss's own battle script; only selection weights, HP checks, distances and cooldowns are kept, and what each routine looks like isn't named yet.

Where you fight it 2

Each place uses its own copy of the boss with that area's scaling. HP and stance as you meet them (first phase, offline, no new game plus).

PlaceHPStanceScaling
Forbidden Lands · Divine Tower of East Altus: Gate6,53965×4.844
Forbidden Lands · Divine Tower of East Altus: Gate7,87165×4.844

Damage negation

How much of each damage type it shrugs off. Lower is better for you; the type it takes most is highlighted.

Standard0%
Slash-10%
Strike0%
Pierce0%
Magic0%
Fire0%
Lightning0%
Holy20%

Flat defense

Subtracted from each hit before negation; it matters most for weak hits. Area scaling raises it along with HP.

Physical115
Magic115
Fire115
Lightning115
Holy115

Status buildup to proc

Buildup needed for the first proc, and how much more each following proc needs (it grows after every proc, up to the fifth).

Status1st proc2nd3rd4th
Poison248290388678
Scarlet Rot248290388678
Bleed248290388678
Frost248290388678
Sleep248290388678
MadnessImmune
Death BlightImmune

HP in each journey

At Forbidden Lands · Divine Tower of East Altus: Gate: new game plus multiplies HP, defense and resistances again on top of the area's scaling.

NGNG+1NG+2NG+3NG+4NG+5NG+6NG+7
7,8719,94910,94411,44211,93912,93413,43113,929

Kill-speed simulator New

How many hits Fell Twin takes with your weapon and stats, in any journey: damage per hit through its defense and negations, stance, and status procs as its thresholds grow.

Simulate Fell Twin

Patch history 2

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

  1. 1.02.1from 1.00
    • Slash negation-20%→-10%
    • Pierce negation-20%→0%
    Every changed value (5)
    ValueBeforetoAfterChange
    Key changes 2
    Slash negation×2 variants-20%-10%+10 pts
    Pierce negation×2 variants-20%0%+20 pts
    Linked data 3
    SpEffect ID [13]×2 variants90,16290,161changed
    SpEffect ID [14]×2 variants90,2000changed
    SpEffect ID [31]×2 variants-14,301changed
  2. 1.12.1from 1.10
      Every changed value (2)
      ValueBeforetoAfterChange
      Damage 1
      HP Burn Damage %×2 variants0100+100
      Linked data 1
      DLC Completion SpEffect ID×2 variants0-1changed

    Other bosses in Forbidden Lands