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Fortify

From Diablo 4 Wiki

This Fortify guide will lay out what the mechanic is, what it is not and how it can be used in Diablo 4. Although any class can technically access the Fortify mechanic it is the Barbarian, Druid and Necromancer who can take full advantage of it.

What is Fortify

Fortify is a damage reduction mechanic that can reduce incoming damage by at least 15% for a variable period of time. It is not a shield like Barrier and does not work in the same way nor is it affected by any buff that kicks in "While you have an active barrier". You can be Fortified and have a Barrier at the same time.

Fortify itself does nothing for you, it is only when your Fortify level is greater than or equal to your current Life (not Max Life) that you become Fortified and that is when the damage mitigation kicks in.

Attacks building up Fortify
Attacks building up Fortify
Fortified
Fortify level equal or higher than health level so you're Fortified!
Fortified doesn't stop you becoming Vulnerable
Fortified and Vulnerable
Fortified and Barrier active at the same time
Fortified and Barrier active at the same time

Your health globe will indicate when you have become fortified with a heavy metal encasement around it (image right). If your health level then increases above your Fortify level (you drink a potion or generate health another way) you will become unfortified. This means you can end up flipping between the two states of Fortified and Unfortified very easily so it's a mechanic you should go all in on and stack up on as many Fortify-generating items as you can to ensure you can stay Fortified for the longest period possible.

How Does Fortify Reduce Damage?

Its base damage reduction is 10% but this can be increased by choosing skills and items as detailed below. Once Fortified, you will benefit from at least the base 10% reduction for as long as the level remains above your health level.

If you take a hit that takes your Fortify level below your health you will be Fortified for a portion of the damage below your health line. For example:

  • You have 700 Health Level
  • You have 500 Fortify Level
  • You are hit for 300 reducing your health to 400
  • The first 100 of that hit you are not fortified
  • The last 200 of theathit you are fortified.

If you stop attacking and therefore generating Fortify the Fortify level will begin to drop and if it drops below your health line you become Unfortified again.

  • Fortify is also part of the Overpower calculation.

Fortify Skills

The following active and passive skills generate Fortify or apply bonuses whilst you are Fortified.

Barbarian
Basic Tree
Enhanced Bash Upgrade

Enhanced Bash

Damaging a Stunned (CC) enemy with Bash grants you 20% Maximum Life (1) as Fortify . Double this amount when using a Two-Handed weapon.

Skill

Defensive Tree
Upgrade Hub
Strategic Iron Skin

Iron Skin also grants 20% Maximum Life as Fortify. Double this amount if cast while below 50% Life.

Requires point in Enhanced Iron Skin.

Skill

Upgrade Hub
Strategic Rallying Cry

Rallying Cry grants you 10% Maximum Life as Fortify. While Rallying Cry is active, you gain an additional 2% Maximum Life as Fortify each time you take or deal Direct Damage.

Requires point in Enhanced Rallying Cry.

Skill

Brawling Tree
Upgrade Hub
Mighty War Cry

War Cry grants 15% Maximum Life as Fortify.

Requires point in Enhanced War Cry.

Skill

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Thick Skin

Each time you take direct damage gain 0.4% Maximum Life (1) as Fortify.

Damage: Physical Damage
Passive

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Counteroffensive

While you have Fortify for over 50% of your Maximum Life, you deal 4%[x] increased damage.

Damage: Physical Damage
Passive

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Defensive Stance

Increase the Damage Reduction gained while you are Fortified by an additional 2%.

Damage: Physical Damage
Passive

Druid
Basic Tree
Upgrade Hub
Fierce Earth Spike

Fortify for 12% of your Maximum Life whenever Earth Spike damages enemies who are Stunned, Immobilized, or Knocked Back.

Skill

Upgrade Hub
Enhanced Maul

If an enemy is hit by Maul, then Fortify for 8% of your Maximum Life.

Skill

Defensive Tree
Preserving Earthen Bulwark Upgrade

Preserving Earthen Bulwark

Casting Earthen Bulwark grants 18% of your Maximum Life (1) as Fortify .

Skill

Enhanced Debilitating Roar Upgrade

Enhanced Debilitating Roar

Debilitating Roar also Fortifies you for 22% of your Maximum Life (1) .

Skill

Companion Tree
Ferocious Wolf Pack Upgrade

Ferocious Wolf Pack

Lucky Hit: Your Wolves' attacks have up to a 40% chance to Fortify you for 8% of your Maximum Life (1) .

Skill

Wrath Tree
Upgrade Hub
Natural Boulder

While you have any Fortify, Boulder has +20% increased Critical Strike Chance.

Skill

Natural Trample Upgrade

Natural Trample

Casting Trample grants 20% of your Maximum Life (1) as Fortify .

Skill

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Safeguard

Critical Strikes with Earth Skills Fortify you for 3% of your Maximum Life (1).

Damage: Physical Damage
Tags: Earth, Nature Magic Passive

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Stone Guard

While you have Fortify for over 50% of your Maximum Life, your Earth Skills deal 4%[x] increased damage.

Damage: Physical Damage
Tags: Earth, Nature Magic Passive

Ultimate Tree
Upgrade Hub
Supreme Grizzly Rage

Gain 8% Maximum Life as Fortify per second while Grizzly Rage is active.

Skill

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Defensive Posture

Increases the amount of Fortify you gain from all sources by 5%[+] and you gain 3% Damage Reduction while Fortified

Damage: Physical Damage
Passive

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Thick Hide

Whenever you are Stunned (CC), Immobilized (CC) or Knocked Down (CC), Fortify for 10% of your Maximum Life (1).

Damage: Physical Damage
Passive

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Nature's Resolve

span class="range">5% chance when struck to Fortify you for 4.4% of your Maximum Life (1).

Damage: Physical Damage
Passive

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Unrestrained

Reduce the duration of Control Impairing Effects by 5%. Double this effect while you have Fortify for over 50% of your Maximum Life.

Damage: Physical Damage
Passive

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Natural Fortitude

Shapeshifting Fortifies you for 2% of your Maximum Life (1).

Damage: Physical Damage
Tags: Shapeshifting Passive

Necromancer
Basic Tree
Initiate's Hemorrhage Upgrade

Initiate's Hemorrhage

Hemorrhage grants 1.6% of your Maximum Life (1) as Fortify each time it hits an enemy, and has a 1.5% chance per enemy hit to Fortify you for 100% of your Maximum Life (1) .

Skill

Core Tree
Upgrade Hub
Supernatural Blood Surge

Each time an enemy is hit by Blood Surge's nova, you are Fortified for 1.1% Maximum life. While you have Fortify for over 50% of your Maximum Life, Blood Surge deals x 30% increased damage.

Skill

Corpse & Macabre Tree
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Drain Vitality



Lucky Hit: Hitting enemies with Blood Skills has up to a 30% chance to Fortify you for 2.5% of your Maximum Life (1).
Damage: Physical Damage
Tags: Blood Passive


Fortify Items

The following items either generate Fortify or apply a bonus whilst you are Fortified.

Legendary Aspects

Aspect of Numbing Wrath
Defensive Each point of Fury generated while at Maximum Fury grants [21 - 41] Fortify.

Helm, Chest, Pants, Shield, Amulet (+50%)

Heathen's Keep
(Map)
Hawezar Barbarian
Aspect of Tempering Blows
Defensive After swapping weapons 5 times, gain [689 - 1,724] Fortify.

Helm, Chest, Pants, Shield, Amulet (+50%)

Defiled Catacomb
(Map)
Fractured Peaks Barbarian
Aspect of Retaliation
Offensive Your Core Skills deal up to [15 - 30]%[x] increased damage based on your amount of Fortify..

Gloves, Offhand, 1H Weapon, 2H Weapon (+100%), Ring, Amulet (+50%)

Seaside Descent
(Map)
Dry Steppes Druid
Ballistic Aspect
Utility When you have Fortify your Earth Skills gain +2 Ranks.

Helm, Chest, Gloves, Boots, Shield, Amulet (+50%)

Whispering Pines
(Map)
Scosglen Druid
Skinwalker's Aspect
Defensive When you use a Shapeshifting Skill that changes your form, gain [414 - 827] Life. If you are at full Life, gain the same amount as Fortify.

Helm, Chest, Pants, Shield, Amulet (+50%)

Fading Echo
(Map)
Kehjistan Druid
Steadfast Berserker's Aspect
Defensive Lucky Hit: Up to a 35% chance to gain [1,172 - 2,206] Fortify whenever you deal direct damage while Berserking.

Helm, Chest, Pants, Shield, Amulet (+50%)

N/A Extraction Barbarian


Unique Items

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Mutilator Plate

"The Cathedral of Light's earliest attempts at crafting their penitent armor was to infuse the plate with painful blood magic, before such acts were deemed heretical." - Barrett's Book of Implements

Type: Ancestral Unique Chest Armor
Class: Necromancer

Description: You are Blood Lanced, and when Blood Lance would deal damage to you, it instead Fortifies you for [1.0 - 2.0]% of your Maximum Life and has a 5% chance to form a Blood Orb.Blood Lance deals [10 - 20]%[x] increased damage.


    Affixes: (Item Power 925)
    • +[28 - 42] Willpower
    • +[12.5 - 19.5]% Total Armor
    • +[7.0 - 14.0]% Healing Received
    • +[403 - 873] Maximum Life
    1997530608.png

    Insatiable Fury

    When the Days of Ash began, the great druid Nafain reminded his disciples that nothing, not even the loss of their humanity, was too great a sacrifice to protect Túr Dúlra from Astaroth's flames.

    Type: Ancestral Unique Chest Armor
    Class: Druid

    Description: Werebear form is now your true form, and you gain +3 Ranks to all Werebear Skills.


      Affixes: (Item Power 925)
      • +[10.5 - 17.5]% Physical Damage
      • +[84.0 - 126.0]% Overpower Damage
      • [4.9 - 10.5]% Damage Reduction while Fortified
      • +[25.5 - 46.5]% Total Armor while in Werebear Form
      3148654398.png

      Vasily's Prayer

      "Roots from the Great Oak growing at the seaward statue of Vasily will, on rare occasions, be found twisted back upon themselves, suffused with ferocious magic." - Barrett's Book of Implements

      Type: Ancestral Unique Helm
      Class: Druid

      Description: Your Earth Skills are now also Werebear Skills and Fortify you for [14 - 28].


        Affixes: (Item Power 925)
        • +[10.5 - 17.5]% Damage while Shapeshifted
        • +[42.0 - 63.0]% Overpower Damage
        • +[403 - 873] Maximum Life
        • +[19.0 - 40.0]% Lightning Resistance


        Paragon Glyphs

        magicglyph.png

        Battle-Hardened

        Magic: Barbarian / Druid / Necromancer

        Bonus:

        • For every 5 Willpower (Barb/Necro) / Intelligence (Druid) purchased within range, you gain + 0.8% increased damage while Fortified.


        40int.png

        Blood-Drinker

        Rare: Necromancer

        Bonus:

        • Grants 30% bonus to all Magic nodes within range.

        Additional Bonus:

        Requirements: 40 Intelligence (in radius range)

        40int.png

        Exhumation

        Rare: Necromancer

        Bonus:

        • For every 5 Intelligence purchased within range, your Corpse Skills deal + 3.3% (lvl 1) - 14% (lvl 21) increased damage.

        Additional Bonus:

        • Consuming a Corpse Fortifies you for 4% of your Maximum Life and grants 4% Damage Reduction for 4 seconds.

        Requirements: 40 Intelligence (in radius range)

        25will.png

        Undaunted

        Rare: Barbarian / Druid / Necromancer

        Bonus:

        • For every 5 Willpower (Barb, Necro) / Intelligence (Druid) purchased within range, you deal + 2% (lvl 1) - 10% (lvl 21) increased damage while Fortified.

        Additional Bonus:

        • You gain 10% Damage Reduction the more Fortify you have.

        Requirements: 25 Willpower (Barb, Necro) / Intelligence (Druid) (in radius range)


        Fortify Item Affixes

        Attribute Amulet Ring Chest Legs Boots Off-Hand Shield
        Damage Reduction Whilst Fortified
        [4.9 - 10.5%] - Barb, Druid, Necro
        Fortify Generation
        [15 - 22%] - Barb, Druid, Necro
        Attribute Amulet Ring Chest Legs Boots Off-Hand Shield

        Note: Offhand is Druid and Necromancer only and Shield is Necromancer only.



        Name Description
        Fortify Fortified characters take 10% reduced damage. You become Fortified when you have more Fortify than your current Life.