Damage Reduction - The damage suffered is mitigated by certain percent. Damage Reduction is capped at 90% and applied multiplicative.
Type: effect - Category: Damage, Damage Reduction
See also: | 
Armor-Piercing | 
Boosted Damage | 
Chaos Damage | 
Chaos Damage Reduction | 
Damage Reduction | 
Extra Attacks | 
Health Loss | 
Splash Damage | 
Unhealable Damage
Chaos Damage Reduction reduces the Damage taken by a certain percentage, up to a maximum of 90%. In the game there are several types of damage reduction like reduction of
- Physical damage by
Armored and Thick Skin. - Magical and Elemental damage by Magical and other traits.
- Chaos damage by Chaos Damage Reduction
- damage caused by Melee attacks by the Flying trait
- damage in PvPby Runes that have Damage Reduction in PvP.
Damage Reduction from different sources are applied one after the other.
Example
A hero that is
- Armored (Takes 25% less damage from Physical attacks.) and
- Flying II (Takes 50% less damage from Melee attacks.)
is hit by a 1000 damage Physical Melee attack.
The damage taken would be 1000 - 250 (Armored) = 750, then 750 - 375 (Flying II) = 375 damage, 62.5% total damage reduction.
The damage calculation is also called multiplicative because you can calculate it like this:
damage taken = base damage * (1-DR1) * (1-DR2) ...
For the example this is:
= 1000 * (1-0.25) * (1-0.5)
= 1000 * 0.75 * 0.5 = 375 damage dealt.
The total damage reduction is 62.5%, not 75% as if they were added.
Heroes
The following heroes have or can inflict/apply Damage Reduction:
Rage (Trait): Gains Rage when hit. Rage modifies abilities, increases damage of their attacks and reduces taken damage. Stacks up to 5 times, resets each encounter, and cannot be copied or stolen.
That's a Moray (Trait): Marks the last target hit, and takes less damage from all unmarked enemies. When no mark is on the enemy team, take less damage from all sources.
Armored (Trait): Takes 25% less damage from Physical attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Graniteform (Trait): Starts dungeons as a statue, greatly reducing damage (-90%) taken, until his first turn. Cleanses all Debuffs but keeps Buffs when entering Graniteform. Cannot be stolen, copied, or purged.
Flying (Trait): Takes reduced damage from Melee attacks.
Armored (Trait): Takes 25% less damage from Physical attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Hardened Spirit (Trait): Takes [60%] less damage from AOE attacks. Skill increases the % value.
Not Alone (Trait): This hero gains +10% Damage Reduction for each other living ally. Armored (Trait): Takes 25% less damage from Physical attacks. Flying (Trait): Takes reduced damage from Melee attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Demon's Bane (Trait): Takes reduced damage from Demon enemies and deals 2x damage to them.
Angelic (Trait): Cannot be Poisoned, Burned, Frozen, Chilled, Envenomed, Shocked, or Diseased and starts dungeons with an [Aegis Shield]. Armored (Trait): Takes 25% less damage from Physical attacks.
Armored (Trait): Takes 25% less damage from Physical attacks.
Ethereal (Trait): Gains 20% Damage Reduction and Ethereal Spirit on the first turn. The shield-like buff prevents that HP drops below 1. This effect cannot be stolen or purged. Shield-Piercing attacks ignore the Ethereal Spirit shield.
Aegis Wall (Special Attack): Heals and Shields the team, negating the next damage source received at the cost of the Shield expiring immediately. Debuffs can still be applied. Armored (Trait): Takes 25% less damage from Physical attacks.
Rage (Trait): Gains Rage when hit. Rage modifies abilities, increases damage of their attacks and reduces taken damage. Stacks up to 5 times, resets each encounter, and cannot be copied or stolen. Armored (Trait): Takes 25% less damage from Physical attacks.
Flying (Trait): Takes reduced damage from Melee attacks.
Armored (Trait): Takes 25% less damage from Physical attacks. Flying (Trait): Takes reduced damage from Melee attacks.
Kindred Mourning (Trait): Becomes Invincible (immune to all damage) for 2 turns if an allied Reptile dies. Invincibility will only be applied if an allied Reptile of an equal or greater level dies.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Armored (Trait): Takes 25% less damage from Physical attacks.
Fanning the Flames (Trait): At 25% Pressure, allies gain 30% DEF. At 50% Pressure, allies gain 25% Damage Reduction. At 75% Pressure, allies gain 20% ATK. At 100% Pressure, allies become Hasted, Pressure drops back down to 60%. The Furnace does not lose Pressure from this.
Armored (Trait): Takes 25% less damage from Physical attacks.
Honorbound (Trait): Takes 50% less damage from AOE attacks (attacks that hit all enemies), and buffs applied to this hero last an additional round.
Armored (Trait): Takes 25% less damage from Physical attacks.
Indomitable Will (Trait): Barbarian allies gain +15% Damage Reduction per stack of Rage. Rage (Trait): Gains Rage when hit. Rage modifies abilities, increases damage of their attacks and reduces taken damage. Stacks up to 5 times, resets each encounter, and cannot be copied or stolen. Armored (Trait): Takes 25% less damage from Physical attacks.
Epic Unbridled Rage (Trait): Self and allied Barbarians are immune to Fear and if they would die, ignores death but grants a shield for a turn (like Ethereal Spirit, HP does not drop below 1). Ignores Shield Piercing & Chaos Damage, happens once per dungeon. (This trait replaces 'Unbridled Rage' when the Epic is unlocked.) Unbridled Rage (Trait): Self and allied Barbarians are immune to Fear and if they would die, ignores death but gains a shield for a turn (like Ethereal Spirit, HP does not drop below 1). Unbridled Rage happens once per dungeon.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks. Ethereal (Trait): Gains 20% Damage Reduction and Ethereal Spirit on the first turn. The shield-like buff prevents that HP drops below 1. This effect cannot be stolen or purged. Shield-Piercing attacks ignore the Ethereal Spirit shield.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Fire Priestess (Trait): This hero gains 10% damage reduction for each other fire hero on the team. Attacks have a [25/50/100]% chance to burn on hit. The percentage depends on the rank (I-III) of this trait. Each Ascension increases the boost.
Cloak of Fire (Trait): Allies gain immunity to burn and take 50% less damage from fire attacks.
Thick Skin (Trait): Takes 25% less damage from Physical attacks.
Flying (Trait): Takes reduced damage from Melee attacks.
Venom Defense (Trait): Reduces [5%/7%/10%] damage taken per Venom debuff (on the attacker), [20%/40%/55%] chance to apply Venom to melee attackers. When killed, applies Venom to all enemies. The [%] values depend on the rank (I,II,III) of this trait. Armored (Trait): Takes 25% less damage from Physical attacks.
Armored (Trait): Takes 25% less damage from Physical attacks.
Mammoth Guard (Trait): Starts the battle with +DEF, Taunts, and reduces damage dealt to all allies. Effects are reduced as Momentum increases. Taunt is removed at 3 Momentum.
Bunny Allergy (Trait): Deals 20% more damage for each Lil Bunny on the field. Takes 50% reduced damage from all non-Chaos source. Damage Reduction is reduced by 20% for each Lil Bunny on the field. Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Armored (Trait): Takes 25% less damage from Physical attacks.
Crystallized Carapace (Special Attack): Taunts, gains 75% Damage Reduction, and heals allies the damage taken. Enemies who hit him have their attack lowered by [15]% (55% @ lvl 80) while the taunt is active. Starts Powered.
Armored (Trait): Takes 25% less damage from Physical attacks.
Honorbound (Trait): Takes 50% less damage from AOE attacks (attacks that hit all enemies), and buffs applied to this hero last an additional round.
Master of Combat (Trait): Armored Hero that cannot Miss or be Dodged.
Armored (Trait): Takes 25% less damage from Physical attacks. Ethereal (Trait): Gains 20% Damage Reduction and Ethereal Spirit on the first turn. The shield-like buff prevents that HP drops below 1. This effect cannot be stolen or purged. Shield-Piercing attacks ignore the Ethereal Spirit shield.
The Face of Terror (Trait): [5%/10%/15%] Damage Reduction from enemies inflicted with Terror. The percentage depends on the rank of this trait (I-III).
Armored (Trait): Takes 25% less damage from Physical attacks.
Tit for Tat (Trait): Aegis Shield will be generated when damaged. Any CRIT taken on this Hero will cause them to CRIT on their next action, even if elementally disadvantaged.
Rage (Trait): Gains Rage when hit. Rage modifies abilities, increases damage of their attacks and reduces taken damage. Stacks up to 5 times, resets each encounter, and cannot be copied or stolen.
Armored (Trait): Takes 25% less damage from Physical attacks.
Monstrous Presence (Trait): Monsters take reduced damage from debuffed characters (-10% per debuff), and cannot be retaliated against.
Elven Grace (Trait): Takes significantly reduced damage from CRITs and deals 2x damage to Flying enemies.
Flying (Trait): Takes reduced damage from Melee attacks.
Honorbound (Trait): Takes 50% less damage from AOE attacks (attacks that hit all enemies), and buffs applied to this hero last an additional round.
Epic Veil of Voltage (Trait): All allies gain 25% Damage Reduction and gain +1 Energy whenever they deal damage to a shocked enemy. Honorbound allies gain double this effect and chance to shock on CRIT. (This trait replaces the trait 'Veil of Voltage' when the Epic is unlocked.)
Dryad Ice (Trait): Starts dungeons in Ice Block, reducing damage taken (90% Damage Reduction) and Debuff immune until their first turn. Can't be stolen, copied, or purged.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Thick Skin (Trait): Takes 25% less damage from Physical attacks.
Elven Grace (Trait): Takes significantly reduced damage from CRITs and deals 2x damage to Flying enemies. Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
The Guardian (Special Attack): Forces enemies to target single attacks on this char and adds an anti-magic aura to team, 9% (scales) damage reduction from magic attacks. Starts Powered.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks. Flying (Trait): Takes reduced damage from Melee attacks.
Not Alone (Trait): This hero gains +10% Damage Reduction for each other living ally.
Armored (Trait): Takes 25% less damage from Physical attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Hardened Spirit (Trait): Takes [60%] less damage from AOE attacks. Skill increases the % value.
Armor's Bane (Trait): Takes reduced damage from Armored enemies and deals 2x damage to Armored enemies. Ethereal (Trait): Gains 20% Damage Reduction and Ethereal Spirit on the first turn. The shield-like buff prevents that HP drops below 1. This effect cannot be stolen or purged. Shield-Piercing attacks ignore the Ethereal Spirit shield.
Ethereal (Trait): Gains 20% Damage Reduction and Ethereal Spirit on the first turn. The shield-like buff prevents that HP drops below 1. This effect cannot be stolen or purged. Shield-Piercing attacks ignore the Ethereal Spirit shield.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Dragon Scales (Trait): All Dragon allies are immune to Debuffs for the first round, and take reduced damage from Chaos, Basic, and Epic attacks. Flying (Trait): Takes reduced damage from Melee attacks.
Armored (Trait): Takes 25% less damage from Physical attacks.
Armored (Trait): Takes 25% less damage from Physical attacks.
Armored (Trait): Takes 25% less damage from Physical attacks.
Elven Grace (Trait): Takes significantly reduced damage from CRITs and deals 2x damage to Flying enemies.
Darting Defense (Trait): Ranged Allies take 25% reduced damage from basic and epic attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Armored (Trait): Takes 25% less damage from Physical attacks.
Honorbound (Trait): Takes 50% less damage from AOE attacks (attacks that hit all enemies), and buffs applied to this hero last an additional round. Master of Combat (Trait): Armored Hero that cannot Miss or be Dodged.
Ice Block (Trait): Starts dungeons in Ice Block, reducing damage taken (90% Damage Reduction) and Debuff immune until his first turn. Can't be stolen, copied, or purged.
Sanctified Spell Absorption (Trait): Allies take significantly reduced damage from non-Physical (-60%) and Chaos attacks (-20%). Epic Spell Absorption (Trait): Allies take significantly reduced damage from non-Physical (-60%) and Chaos attacks (-20%). Assassin allies take even less damage (-70% and -30%, respectively). (This trait replaces 'Sanctified Spell Absorption' when the Epic is unlocked.) 
Ethereal (Trait): Gains 20% Damage Reduction and Ethereal Spirit on the first turn. The shield-like buff prevents that HP drops below 1. This effect cannot be stolen or purged. Shield-Piercing attacks ignore the Ethereal Spirit shield.
Elven Grace (Trait): Takes significantly reduced damage from CRITs and deals 2x damage to Flying enemies. Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Honorbound (Trait): Takes 50% less damage from AOE attacks (attacks that hit all enemies), and buffs applied to this hero last an additional round. Armored (Trait): Takes 25% less damage from Physical attacks.
Just a Scratch (Trait): Any Melee attacker that has lower ATK than Astrid's DEF only deals 1 damage to her and grant her a stack of +20% ATK. Maximum 10 stacks, cannot expire.
Way of the Monk (Trait): Immune to CRITs and starts dungeons with an Aegis Shield.
Protector of the Realm (Trait): Takes less damage from Beast, Demon, Monster, and Undead enemies and deals 2x damage to those enemy types. Tit for Tat (Trait): Aegis Shield will be generated when damaged. Any CRIT taken on this Hero will cause them to CRIT on their next action, even if elementally disadvantaged. Armored (Trait): Takes 25% less damage from Physical attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks. Flying (Trait): Takes reduced damage from Melee attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks. Tit for Tat (Trait): Aegis Shield will be generated when damaged. Any CRIT taken on this Hero will cause them to CRIT on their next action, even if elementally disadvantaged.
Chaos Shield (Trait): Takes 40% less damage from non-Chaos attacks. Flying (Trait): Takes reduced damage from Melee attacks.
Armored (Trait): Takes 25% less damage from Physical attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Stone Skin (Trait): Takes 50% reduced damage from all non-Chaos sources. Immune to being Stoned, Burned, Frozen, and Shocked. Armored (Trait): Takes 25% less damage from Physical attacks.
Hidden Power (Trait): Gains 25% Damage Reduction for 1 turn whenever a debuff is applied on this Hero.
Blending In (Trait): Immune to damage and Silence during the first round. Can't be Stolen, Copied or Purged. Venom Defense (Trait): Reduces [5%/7%/10%] damage taken per Venom debuff (on the attacker), [20%/40%/55%] chance to apply Venom to melee attackers. When killed, applies Venom to all enemies. The [%] values depend on the rank (I,II,III) of this trait.
Dwarven Forged Team (Trait): Armored allies gain +15% Damage Reduction from Ranged and Melee attacks. Armored (Trait): Takes 25% less damage from Physical attacks.
Armor's Bane (Trait): Takes reduced damage from Armored enemies and deals 2x damage to Armored enemies.
Flying (Trait): Takes reduced damage from Melee attacks.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
The Last Word (Trait): Slow allies and self take 30% reduced damage from Fast enemies. Slow allies revenge attacks twice. Slow allies can't have buffs removed or debuffs added by fast enemies. Thick Skin (Trait): Takes 25% less damage from Physical attacks.
Ethereal (Trait): Gains 20% Damage Reduction and Ethereal Spirit on the first turn. The shield-like buff prevents that HP drops below 1. This effect cannot be stolen or purged. Shield-Piercing attacks ignore the Ethereal Spirit shield.
Kindred Mourning (Trait): Becomes Invincible (immune to all damage) for 2 turns if an allied Reptile dies. Invincibility will only be applied if an allied Reptile of an equal or greater level dies.
Death Bites (Special Attack): Ranged Physical attack on all enemies that consumes up to 5 Venom stacks and deals 20% more damage for each Venom stack removed. Will grant 'Invincibility' on a killing blow.
Ethereal (Trait): Gains 20% Damage Reduction and Ethereal Spirit on the first turn. The shield-like buff prevents that HP drops below 1. This effect cannot be stolen or purged. Shield-Piercing attacks ignore the Ethereal Spirit shield.
Elven Grace (Trait): Takes significantly reduced damage from CRITs and deals 2x damage to Flying enemies.
Honorbound (Trait): Takes 50% less damage from AOE attacks (attacks that hit all enemies), and buffs applied to this hero last an additional round.
Fog of War (Special Attack): Ranged Dark attack on all enemies that Diseases on hit, and self and allies receive -50% damage from Epic attacks for 3 turns.
Magical (Trait): Takes [25%/35%/50%] less damage from non-Physical attacks.
Aegis Bandage (Special Attack): Heals the team and Shields target ally, negating the next damage source received at the cost of the Shield expiring immediately. Debuffs will still be applied.
Honorbound (Trait): Takes 50% less damage from AOE attacks (attacks that hit all enemies), and buffs applied to this hero last an additional round. Thick Skin (Trait): Takes 25% less damage from Physical attacks.
Safe Haven (Special Attack): Cleanses all debuffs from target ally and grants them Invincibility for 1 turn. Flying (Trait): Takes reduced damage from Melee attacks.
Tangled Triad (Trait): If on a team with 2 or more allied Gorgons, self and Gorgon allies start dungeons with Invincibility for their first turn. Kindred Mourning (Trait): Becomes Invincible (immune to all damage) for 2 turns if an allied Reptile dies. Invincibility will only be applied if an allied Reptile of an equal or greater level dies.
Ageless Immortals (Trait): Reptile allies gain 1 turn of Invincibility when purging Venom.
Ultimate Skins with Damage Reduction:
Oak Form (Trait): Starts dungeons in Oak Form, reducing damage taken (-90%) and debuff immune until her first turn. Can't be stolen, copied, or purged. If Lily would be killed for the first time, enters Oak Form instead and heals 25% of the Max Health.
