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Elden Ring
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BossStormveil CastleStranded GraveyardChanged in 1 patchVerified on build 25080141

Ulcerated Tree Spirit

Fought in 13 places, from 4,492 HP to 31,072 HP at Shadow Keep, Church District · Tree-Worship Passage: each placement carries its own area scaling. It takes the most damage from Fire and the least from Holy.

Where you fight it 13

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
Stormveil Castle · Rampart Tower4,492120×1.656
Stranded Graveyard · Cave of Knowledge6,147120×2.266
Capital Outskirts · Outer Wall Phantom Tree8,817120×3.25
Leyndell, Royal Capital · Avenue Balcony10,046120×3.703
Mt. Gelmir · Ninth Mt. Gelmir Campsite11,191120×4.125
Mt. Gelmir · Wyndham Catacombs13,141120×4.844
Leyndell, Ashen Capital · East Capital Rampart ×218,144120×6.688
Leyndell, Ashen Capital · Queen's Bedchamber18,144120×6.688
Belurat, Tower Settlement · Small Private Altar21,280120×7.844
Gravesite Plain · Ellac River Cave23,357120×8.609
Shadow Keep, Church District · Church District Entrance31,072120×11.453
Shadow Keep, Church District · Sunken Chapel ×231,072120×11.453
Shadow Keep, Church District · Tree-Worship Passage31,072120×11.453

Damage negation

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

Standard0%
Slash0%
Strike0%
Pierce0%
Magic20%
Fire-20%
Lightning20%
Holy40%

Flat defense

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

Stormveil Castle · Rampart Tower

Physical103
Magic103
Fire103
Lightning103
Holy103

Stranded Graveyard · Cave of Knowledge

Physical107
Magic107
Fire107
Lightning107
Holy107

Capital Outskirts · Outer Wall Phantom Tree

Physical111
Magic111
Fire111
Lightning111
Holy111

Leyndell, Royal Capital · Avenue Balcony

Physical113
Magic113
Fire113
Lightning113
Holy113

Mt. Gelmir · Ninth Mt. Gelmir Campsite

Physical114
Magic114
Fire114
Lightning114
Holy114

Mt. Gelmir · Wyndham Catacombs

Physical115
Magic115
Fire115
Lightning115
Holy115

Leyndell, Ashen Capital · East Capital Rampart, Leyndell, Ashen Capital · Queen's Bedchamber

Physical120
Magic120
Fire120
Lightning120
Holy120

Belurat, Tower Settlement · Small Private Altar

Physical121
Magic121
Fire121
Lightning121
Holy121

Gravesite Plain · Ellac River Cave

Physical122
Magic122
Fire122
Lightning122
Holy122

Shadow Keep, Church District · Church District Entrance, Shadow Keep, Church District · Sunken Chapel, Shadow Keep, Church District · Tree-Worship Passage

Physical123
Magic123
Fire123
Lightning123
Holy123

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).

Stormveil Castle · Rampart Tower

Status1st proc2nd3rd4th
Poison5178071,2641,264
Scarlet Rot5178071,2641,264
Bleed5178071,2641,264
Frost230272370660
SleepImmune
MadnessImmune
Death BlightImmune

Stranded Graveyard · Cave of Knowledge

Status1st proc2nd3rd4th
Poison5308201,2771,277
Scarlet Rot5308201,2771,277
Bleed5308201,2771,277
Frost236278376666
SleepImmune
MadnessImmune
Death BlightImmune

Capital Outskirts · Outer Wall Phantom Tree

Status1st proc2nd3rd4th
Poison5448341,2911,291
Scarlet Rot5448341,2911,291
Bleed5448341,2911,291
Frost242284382672
SleepImmune
MadnessImmune
Death BlightImmune

Leyndell, Royal Capital · Avenue Balcony

Status1st proc2nd3rd4th
Poison5488381,2951,295
Scarlet Rot5488381,2951,295
Bleed5488381,2951,295
Frost244286384674
SleepImmune
MadnessImmune
Death BlightImmune

Mt. Gelmir · Ninth Mt. Gelmir Campsite

Status1st proc2nd3rd4th
Poison5538431,3001,300
Scarlet Rot5538431,3001,300
Bleed5538431,3001,300
Frost246288386676
SleepImmune
MadnessImmune
Death BlightImmune

Mt. Gelmir · Wyndham Catacombs

Status1st proc2nd3rd4th
Poison5578471,3041,304
Scarlet Rot5578471,3041,304
Bleed5578471,3041,304
Frost248290388678
SleepImmune
MadnessImmune
Death BlightImmune

Leyndell, Ashen Capital · East Capital Rampart, Leyndell, Ashen Capital · Queen's Bedchamber

Status1st proc2nd3rd4th
Poison5758651,3221,322
Scarlet Rot5758651,3221,322
Bleed5758651,3221,322
Frost255297395685
SleepImmune
MadnessImmune
Death BlightImmune

Belurat, Tower Settlement · Small Private Altar

Status1st proc2nd3rd4th
PoisonImmune
Scarlet Rot6419311,3881,388
Bleed6419311,3881,388
Frost285327425715
SleepImmune
MadnessImmune
Death BlightImmune

Gravesite Plain · Ellac River Cave

Status1st proc2nd3rd4th
Poison6499391,3961,396
Scarlet Rot6499391,3961,396
Bleed6499391,3961,396
Frost288330428718
SleepImmune
MadnessImmune
Death BlightImmune

Shadow Keep, Church District · Church District Entrance, Shadow Keep, Church District · Sunken Chapel, Shadow Keep, Church District · Tree-Worship Passage

Status1st proc2nd3rd4th
Poison6829721,4291,429
Scarlet Rot6829721,4291,429
Bleed6829721,4291,429
Frost303345443733
SleepImmune
MadnessImmune
Death BlightImmune

HP in each journey

At Shadow Keep, Church District · Tree-Worship Passage: new game plus multiplies HP, defense and resistances again on top of the area's scaling.

NGNG+1NG+2NG+3NG+4NG+5NG+6NG+7
31,07239,81143,79245,78347,77351,75453,74555,735

How its AI decides verified

  • Its attack choices change at 70%, 60% of its HP: some attacks unlock, get likelier or are forced below those points.
  • It picks attacks by how far you are, with cut-offs at 2 m, 2.5 m, 3.5 m, 4 m, 5 m, 7 m, 12 m, 15 m.
  • It chooses among 25 attack routines; 13 have a cooldown (7–60 s).

Read from the game's AI script for this boss. Which animation each routine plays isn't named yet.

Kill-speed simulator New

How many hits Ulcerated Tree Spirit 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 Ulcerated Tree Spirit

Patch history 1

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

  1. 1.02.1from 1.00
    • Runes2,000→4,736
    • Runes3,500→8,820
    • Runes3,600→9,828
    • Runes4,960→18,749

Other bosses in Stormveil Castle