Armor

Armor is a numerical representation of a given Hero's ability to mitigate damage. Each point of Armor is equal to a 1% reduction in damage. Specific types of Armor exist; Physical Armor works against Basic Attacks, whereas Spell Armor works against Ability-based damage Spell damage. Damage that is based on a percent of a given Hero's Health cannot be mitigated by any form of Armor. This means that Giant Killer (+1.5% Max health damage per attack) will do full damage to the target regardless of their current Armor state.

Armor buff and debuff indicators are next to Hero healthbars.

How Armor works
Armor is split into three types: Armor, Physical Armor, and Spell Armor:
 * Armor by itself means that you gain mitigation from both Physical and Spell damage.
 * Physical and Spell Armor mitigate damage from their respective key words.
 * All Abilities deal Spell damage; floating damage text will display Spell Damage as purple numbers above the target’s head
 * All Basic Attacks deal Physical damage; floating damage text will display Physical Damage as orange

Interaction with other Armor effects
Generally, Armor effects of the same Armor type do not stack. Only the highest positive and highest negative Armor effect of a type are applied at a time, and the total Armor is calculated as the difference of the two (see Example 1). Physical and Spell Armor from all-Armor effects are treated separately (see Example 2). Some Armor effects may stack additionally with itself, such as Hanzo's Sharpened Arrowheads, but only if it is specified in the ability's or talent's description.

The cap on maximum positive or negative Armor is 75. There are not many effects that are affected by these limits, Garrosh's talent Double Up being one of the few. While negative Armor effects can go all the way to -75, most effects do not reduce the enemy's Armor by more than -25, which was the previous lower boundary. Unravelling Talent on Chromie and Sgt. Hammer’s Shrapnel Mines are talents that can go below the aforementioned -25 Armor.

Example 1

Greymane in Worgen Form (+10 Armor) gains Safeguard (+30 Armor) from Lt. Morales, while affected by Kel'Thuzad's Chains of Kel'Thuzad (-10 Armor) and Tyrande's Hunter's Mark (-15 Armor) debuffs:
 * Worgen Form Armor (+10) is ignored while the higher positive Armor effect, Safeguard (+30), is active.
 * Chains of Kelthuzad Armor reduction (-10) is ignored while the higher negative Armor effect, Hunter's Mark (-15), is active.
 * In total, Greymane has +15 Armor, as the difference of highest positive (+30) and highest negative (-15) Armor effects

Example 2

Brightwing casts Pixie Dust on Sonya, granting +25 Spell Armor, but Sonya already has 65 Physical Armor from Tough As Nails and activates Ignore Pain to gain 60 Armor:
 * +60 Armor from Ignore Pain is split into +60 Physical Armor and +60 Spell Armor.
 * +60 Physical Armor from Ignore Pain is ignored, while higher Armor effect, Tough As Nails (+65 Physical Armor), is active.
 * Pixie Dust (+25 Spell Armor) is ignored, while Higher Armor effect, Ignore Pain (+60 Spell Armor), is active.
 * In total, Sonya has +65 Physical Armor and +60 Spell Armor

Abilities that grant Armor

 * Blaze's trait, "Pyromania", grants him 40 Armor for 4 seconds.
 * Blaze's level 10 heroic ability, "Bunker Drop", grants 25 Armor for 2 seconds to anyone exiting the bunker.
 * His level 20 talent, "Fortified Bunker", increases the Armor to 50 and its duration to 3 seconds.
 * Cassia's trait, "Avoidance", grants her up to 30 Armor while she remains moving.
 * Her level 20 talent, "Rockstopper", increases the Armor to 60 for 4 seconds.
 * Chen's level 10 heroic ability, "Wandering Keg", grants 25 Armor for the duration of the ability.
 * His level 20 talent, "Untapped Potential", increases the Armor to 75, and he retains the Armor for 3 seconds after Wandering Keg ends.
 * Cho's trait, "Ogre Hide", grants him 25 Armor while it is active.
 * His level 13 talent, "Twilight Veil", increases the Armor by 200% for 2 seconds.
 * Deathwing's trait, "Aspect of Death", gives him 4 Armor Plates that each grant 10 Armor, but break as his health is reduced.
 * Deckard's trait, "Fortitude of the Faithful", grants him 10 Armor when an allied Hero is nearby.
 * His level 16 talent, "Safety in Numbers", increases the Armor to 20 when there are at least 2 allied Heroes nearby.
 * E.T.C.'s trait, "Rockstar", grants him 20 Armor for 2 seconds whenever he uses a basic or a heroic ability.
 * Garrosh's trait, "Armor Up", grants him 1 Armor per 2% of health missing.
 * His level 13 talent, "Double Up", increases the Armor by 100% for 3 seconds.
 * Greymane's trait, "Curse of the Worgen", grants him 10 Armor while in Worgen form.
 * Lt. Morales' ability, "Safeguard", grants the target 30 Armor for 3 seconds.
 * Her level 7 talent, "Vanadium Plating", increases the Armor amount by 20 while the affected target is Stunned or Rooted, and passively increases Safeguard's duration by 1 second.
 * Mal'Ganis' ability, "Necrotic Embrace", grants him 25 Armor for 3 seconds.
 * His level 4 talent, "Might of Sargeras", increase the Armor gained to 50.
 * Muradin's ability, "Dwarf Toss", grants him 25 Armor for 2 seconds.
 * Samuro's level 10 heroic ability, "Bladestorm", grants him 25 Armor for its duration.
 * Sgt. Hammer's ability, "Neosteel Plating", grants her 25 Armor for 2 seconds, increased to 50 while in Siege Mode.
 * Stukov's level 10 heroic ability, "Massive Shove", grants him 50 Armor while shoving an enemy hero.
 * Tychus' level 10 heroic ability, "Comandeer Odin", grants him 25 Armor for its duration.
 * Uther's trait, "Devotion", grants 25 Armor for 2 seconds to any hero he heals.
 * His level 7 talent, "Guardian of Ancient Kings", increases the Armor granted by "Devotion" to 50 if he heals a hero that is Stunned, Rooted or Silenced.
 * His level 20 talent, "Divine Protection", increases the Armor to 40 and the duration to 2.5 seconds.
 * Valeera's level 10 heroic ability, "Smoke Bomb", grants her 30 Armor while she remains in the smoke. Lasts 5 seconds.
 * Whitemane's level 10 heroic ability, "Scarlet Aegis", grants allied heroes in its area of effect 40 armor for 4 seconds.
 * Yrel's level 10 heroic ability, "Sacred Ground", grants her 50 Armor while she remains in the area.

Talents that grant Armor

 * Alexstrasza's level 13 talent, "Dragon Scales", grants her 50 Armor while Stunned, Silenced or Rooted and 2 seconds after. Can only trigger once every 10 seconds.
 * Alexstrasza's level 16 talent, "Tough Love", adds an additional effect to her "Gift of Life" ability, granting the target 30 Armor for 2 seconds if she is above 75% health.
 * Ana's level 13 talent, "Smelling Salts", adds an additional effect to her "Healing Dart" ability, granting the target 50 Armor for 2 seconds if it was Stunned.
 * Artanis's level 4 talent, "Psionic Synergy", adds an additional effect to his "Phase Prism " ability, granting him 30 Armor for 3 seconds if an enemy is hit.
 * Arthas' level 7 talent, "Icebound Fortitude", grants him 25 Armor for 3 seconds.
 * Auriel's level 20 talent, "Diamond Resolve", adds an additional effect to her "Crystal Aegis" heroic ability, granting the target 75 Armor for 5 seconds when it expires.
 * Azmodan's level 4 talent, "Hellforged Armor", adds an additional effect to his "Summon Demon Warrior" ability and "Demon Lieutenant" trait, granting the Demon Warriors and the Demon Lieutenants 25 Armor.
 * Blaze's level 16 talent, "Thermal Protection", adds an additional effect to his "Jet Propulsion" ability, granting him 10 Armor per hero hit for 3 seconds.
 * The Butcher's level 16 talent, "Enraged", grants him 25 Armor for 10 seconds when his health is reduced below 50%. 25 seconds cooldown.
 * Chen's level 16 talent, "Celerity", grants Chen 30 Armor for 3 seconds whenever he Basic Attacks an enemy hero who is Stunned, Rooted, or Slowed.
 * Cho's level 1 talent, "The Will of Cho", grants him 1 Armor for every 30 stacks he gains, up to a maximum of 10.
 * Chromie's level 2 talent, "Time Troubles", adds an additional effect to her "Time Trap" ability, granting allied Heroes affected by Time Stop 30 Armor for 3 seconds.
 * D.Va's level 1 talent, "Pro Moves", grants her mech 2 Armor for 0.5 seconds each time it takes damage, stacking up to 30 Armor.
 * Dehaka's level 16 talent, "Pack Leader", grants him 20 Armor while in a Bush and for 5 seconds after leaving.
 * Diablo's level 4 talent, "Sacrificial Soul", grants him 25 Armor when stunning a Hero with Shadow Charge. When at 100 Souls, this increases to 50 Armor.
 * E.T.C.'s level 16 talent, "Show Stopper", adds an additional effect to his "Powerslide" ability, granting him 35 Armor for 4 seconds.
 * Fenix's level 13 talent, "Adanium Shell", grants him 50 Armor for 4 seconds after arriving with Warp.
 * Garrosh's level 7 talent, "Into the Fray", grants the target ally 25 Armor for 3 seconds.
 * Gazlowe's level 4 talent, "EZ-PZ Dimensional Ripper", grants him 40 Armor for 3 seconds upon activation.
 * Gazlowe's level 20 talent, "Mecha-Lord" causes his Basic Attacks to grant him 10 Armor for 10 seconds, stacking up to 3 times.
 * Hogger's level 1 talent, "Bones to Gnaw", grants him 10 Armor while under the healing effect of "Loot Hoard".
 * Hogger's level 13 talent, "Dust Devil", grants him 20 Armor during "Hogg Wild" and for 3 seconds afterwards, increased to 40 Armor while above 50 Rage.
 * Illidan's level 13 talent, "Nimble Defender", adds an additional effect to his "Sweeping Strike" ability, granting him 25 Armor for 2 seconds if it hits a hero.
 * Imperius' level 4 talent, "Sovereign Armor", causes his "Molten Armor" Ability to grant him 20 Armor for 1.5 seconds upon activation, and extends the Armor duration by .5 seconds each time it damages an enemy Hero.
 * Imperius' level 4 talent, "Press Forward", grants him 10 Armor while affected by a Regeneration Globe.
 * Imperius' level 16 talent, "Valorous Pursuit", granting him 25 Armor for 3 seconds.
 * Leoric's level 20 talent, "Burning Despair", adds an additional effect to his "Drain Hope" ability, granting him 40 Armor while it is active.
 * Li Li's level 4 talent, "Safety Sprint", passively grants her 10 Armor while "Fast Feet" is activate, and can be activated to gain 30 Armor for 3 seconds.
 * Li Li's level 20 talent, "Shake it Off", grants her 35 Armor while Stunned, Silenced, or Rooted.
 * The Lost Vikings' level 4 talent, "Mercenary Lord", grants them 50 Armor against minions and mercenaries.
 * Lt. Morales' level 4 talent, "Trauma Trigger", grants her 40 Armor for 3 seconds when she takes damage below 40% health. 30 seconds cooldown.
 * Lúcio's level 13 talent, "Slip", adds an additional effect to his "Wall Ride" ability, granting him 20 Armor while Wall Ride is active.
 * Maiev's level 13 talent, "Bladed Armor", adds an additional effect to her "Fan of Knives" ability, granting her 5 Armor per enemy hero hit for 5 seconds, up to 20 Armor.
 * Maiev's level 13 talent, "Chain Gang", adds an additional effect to her "Umbral Bind" ability, granting her 35 Armor for 4 seconds if she tethers at least 2 enemy Heroes.
 * Maiev's level 13 talent, "Shadow Armor", adds an additional effect to her "Blink" ability, granting her 20 Armor for 3.5 seconds, basic attacks against enemy Heroes refresh this duration.
 * Medivh's level 4 talent, "Mage Armor", adds an additional effect to his "Portal" ability, granting allies using it for the first time 30 Armor for 4 seconds.
 * Mei's level 16 talent, "Acclimation", grants her 10 Armor while at maximum stacks.
 * Mephisto's level 7 talent, "Ghastly Armor", adds an additional effect to his "Shade of Mephisto" ability, granting him 25 Armor for its duration and 2.5 seconds after it ends.
 * Muradin's level 20 talent, "Unstoppable Force", adds an additional effect to his "Avatar" heroic ability, granting him 20 Armor for its duration.
 * Nazeebo's level 13 talent, "Guardian Toads", adds an additional effect to his "Plague of Toads" ability, granting him 30 Armor for 1.5 seconds, stacking up to 4 seconds, upon hitting a hero.
 * Nova's level 13 talent, "Ionic Force Field", adds an additional effect to her "Permanent Cloak" trait, granting her 25 Armor for 3 seconds after losing stealth.
 * Qhira's level 4 talent, "Your Pain, My Gain", causes her to gain 10 Armor for 3 seconds when basic attacking a hero. Stacks up to 3 times.
 * Ragnaros' level 4 talent, "Catching Fire", grants him 25 Armor for 3 seconds. Can only activate upon completing a quest.
 * Ragnaros' level 13 talent, "Resilient Flame", grants him 40 Armor for 3 seconds upon being Stunned.
 * Raynor's level 4 talent, "Fight or Flight", adds an additional effect to his "Adrenaline Rush" ability, granting him 25 Armor for 3 seconds.
 * Raynor's level 16 talent, "Bounty Hunter", adds an additional effect to his "Give 'Em Some Pepper" trait, granting him 10 Armor for 3 seconds if Give 'Em Some Pepper target is a Hero.
 * Rexxar's level 1 talent, "Easy Prey", grants Misha 50 Armor against minions and mercenaries.
 * Rexxar's level 4 talent, "Hunter-Gatherer", grants him and Misha 15 Armor upon completion.
 * Samuro's level 4 talent, "One With The Wind", adds an additional effect to his "Wind Walk" ability, granting him and his images 30 Armor while it is active and 3 seconds after breaking it.
 * Sonya's level 20 talent, "Ignore Pain", grants her 60 Armor for 4 seconds. Usable during Whirlwind.
 * Stitches's level 20 talent, "Shambling Horror", grants him 50 Armor for 4 seconds.
 * Tassadar's level 13 talent, "Shadow Walk", grants him 25 armor for 1.5 seconds.
 * Tychus' level 7 talent, "Relentless Soldier", grants him 30 Armor for 3 seconds upon being Stunned or Rooted.
 * Tychus' level 20 talent, "Can Do This All Day", adds an additional effect to his "Overkill" ability, granting him 40 Armor for its duration.
 * Tyrael's level 4 talent, "Stalwart Angel", adds an additional effect to his "El'druin's Might" ability, granting him 25 while it is active and 2 seconds after teleporting.
 * Tyrael's level 20 talent, "Defense of the Angels", grants him 50 Armor for 5 seconds.
 * Varian's level 16 talent, "Banner of Ironforge", places a banner that grants 20 Armor to nearby allied heroes. Lasts 12 seconds.
 * Whitemane's level 16 talent, "Radiance", adds an additional effect to her "Zeal" trait, removing the Armor reduction and granting her 15 Armor if it's activated while she has 3 stacks of Desperation.
 * Yrel's level 4 talent, "Aegis of Light", adds an additional effect to her "Avenging Wrath" ability, granting allies 25 Armor for 4 seconds when after landing with Avenging Wrath.
 * Zagara's level 13 talent, "Protective Coating", adds an additional effect to her "Creep Tumor" trait, granting her 20 Armor while on Creep.
 * Zarya's level 13 talent, "Endurance Training", adds an additional effect to her "Energy" trait, granting her 20 Armor while above 75 Energy.
 * Zul'jin's level 4 talent, "Amani Hide", grants him 15 Armor while "Amani Rage"'s health regeneration is active.

Generic talents

 * The level 20 talent, "Hardened Shield", grants 75 Armor for 4 seconds.

Non-heroic targets with Armor

 * Triglav Protector has 10 Armor as long as it is controlled by two heroes.
 * Triglav Protector's ability "Shield Emitter" grants it 25 Armor for several seconds.
 * Generals on Alterac Pass have 20 Armor for each allied Keep remaining.

Abilities that lower Armor

 * Tyrande's trait, "Hunter's Mark", lowers a target enemy's Armor by 15 for 4 seconds.
 * Her level 7 talent, "Huntress' Fury", increases the duration by 1 second.
 * Valeera's ability, "Ambush", lowers a target enemy's Armor by 10 for 5 seconds.
 * Her level 16 talent, "Assassinate", increases the Armor reduction to 20 if there are no other enemy heroes within 4 range of the target.
 * Varian's level 4 heroic ability, "Colossus Smash", lowers a target enemy's Armor by 20 for 3 seconds.
 * Whitemane's trait, "Zeal", can be activated to lower her armor by 25 for 5 seconds and grant 25% increased Spell Power for the same period.

Talents that lower Armor

 * Arthas' level 13 talent, "Shattered Armor", adds an additional effect to his "Howling Blast" ability, lowering the Armor of enemy heroes hit by 15 for 4 seconds.
 * Azmodan's level 20 talent, "Black Pool", adds an additional effect to his "Tide of Sin" heroic ability, lowering the armor of the enemies in its area of effect by 8 per second, up to 15.
 * Brightwing's level 16 talent, "Critterize", adds an additional effect to her "Polymorph" ability, lowering a hero's Armor by 25 for the duration of the Polymorph (1.5 seconds).
 * Chromie's level 4 talent, "Time Troubles", adds an additional effect to her "Time Trap" ability, lowering enemy Heroes affected by Time Stop 15 Armor for 3 seconds.
 * Deckard's level 1 talent, "Scroll of Identify", adds an additional effect to his "Scroll of Sealing" ability, lowering the Armor of enemy Heroes hit by 15 for 4 seconds once the quest is complete.
 * Dehaka's level 13 talent, "Primal Swarm", adds an additional effect to his "Dark Swarm" ability, lowering the Armor of enemies hit by 10 for 0.75 seconds.
 * Diablo's level 13 talent, "Devastating Charge", adds an additional effect to his "Shadow Charge" ability once the quest is complete, lowering the Armor of enemies stunned by 15 for 4 seconds.
 * D.Va's level 13 talent, "Target Locked", adds an addition effect to her "Defense Matrix" ability, lowering the Armor of enemy Heroes that have been in its area for 1.5 seconds by 15 for 3 seconds.
 * Gul'dan's level 20 talent, "Haunt", adds an additional effect to his "Horrify" heroic ability, lowering the Armor of enemies by 25 while they are Feared.
 * Hanzo's level 7 talent, "Sharpened Arrowheads", makes his Basic Attacks and "Storm Bow" lower the armor of enemy Heroes by 2 for 3 seconds, stacking up to 20.
 * Hogger's level 20 talent, "Power Spike", adds an additional effect to his "Shockwave" heroic, lowering the Armor of enemies hit by 15 for 4 seconds.
 * Imperius' level 16 talent, "Melting Touch", lowers enemy Heroes' Armor by 25 for 4 seconds when Imperius consumes a Molten Armor mark from them.
 * Jaina's level 16 talent, "Northern Exposure", adds an additional effect to her "Cone of Cold" ability, lowering the Armor of enemies hit by 20 for 2 seconds.
 * Junkrat's level 7 talent, "Big As", adds an additional effect to his "Steel Trap" ability, lowering the Armor of enemy Heroes hit by 15 for 3 seconds.
 * Kel'Thuzad' level 1 talent, "Barbed Chains", adds an additional effect to his "Chains of Kel'Thuzad" ability, lowering the Armor of pulled enemy Heroes hit by 10 for 4 seconds.
 * Maiev's level 7 talent, "Bonds of Corruption", adds an additional effect to her "Umbral Bind" ability, lowering the Armor of pulled enemy Heroes by 10 for 4 seconds.
 * Maiev's level 20 talent, "Shadow Orb: Shadow Strike", lowers a target enemy Hero's Armor by 20 for 4 seconds.
 * Mei's level 20 talent, "Shatter", adds an additional effect to her "Ice Wall" heroic ability, lowering the Armor of enemies hit by the ability by 25 for 5 seconds.
 * Nova's level 16 talent, "Crippling Shot", adds an additional effect to her "Pinning Shot" ability, lowering a Hero's Armor by 20 for the duration of the Slow (2.25 seconds).
 * Orphea's level 20 talent, "Engulfing Oblivion", adds an additional effect to her "Crushing Jaws" ability, lowering the Armor of enemy Heroes hit by 25 for 2 seconds.
 * Qhira's level 16 talent, "Lingering Ailment", adds an additional effect to her "Revolving Sweep" ability and "Grappling Hook" trait, lowering the Armor of enemy Heroes by either ability by 15 for 3 seconds.
 * Raynor's level 20 talent, "Weak Spot Acquired", lowers Heroic targets of Give 'Em Some Pepper by 25 for 2 seconds.
 * Sgt. Hammer's level 20 talent, "Shrapnel Mines", adds an additional effect to her "Spider Mines" ability, lowering the armor of enemy Heroes by 10 for each Mine hit for 4 seconds, up to 30.
 * Stitches' level 13 talent, "Lacerate", adds an additional effect to his "Slam" ability, reducing 10 Armor of enemy Heroes hit by it for 4 seconds.
 * Sylvanas' level 13 talent, "Cold Embrace", adds an additional effect to her "Shadow Dagger" ability, lowering the Armor of the initial target by 25 and to enemies it spreads by 10 for 2.5 seconds.
 * Tassadar's level 20 talent, "Kugelblitz", lowers the Armor of enemy Heroes hit by his heroic "Black Hole's" center by 20.
 * Tracer's level 16 talent, "Heavy Handed", adds an additional effect to her "Melee" ability, lowering the Armor of heroes hit by 15 for 4 seconds.
 * Whitemane's level 16 talent, "Shared Punishment", lowers the armor of enemy Heroes affected by "Inquisition" by 10.
 * Xul's level 16 talent, "Amplify Damage", adds an additional effect to his "Bone Prison" ability, lowering the Armor of the target by 25 for 1.75 seconds.
 * Yrel's level 16 talent, "Templar's Verdict", adds an additional effect to her "Righteous Hammer" ability, lowering the Armor of enemy Heroes hit by the ability by 20 for 4 seconds.

Talents that grant Physical Armor

 * Johanna's level 1 talent, "Reinforce", grants her 60 Physical Armor for 2.5 seconds after using a basic ability.
 * Kel'Thuzad's level 4 talent, "Armor of the Archlich", grants him 50 Physical Armor for 4 seconds.
 * Kharazim's level 4 talent, "Earth Ally", places an Earth Ally that grants 50 Physical Armor to nearby allied heroes. Lasts 10 seconds.
 * Kharazim's level 13 talent, "Sixth Sense", grants him 75 Physical Armor for 4 seconds upon being Stunned or Rooted.
 * The Lost Vikings' level 1 talent, "Olaf the Stout", grants Olaf 75 Physical Armor against an enemy hero's basic attack every 5 seconds, can store 2 charges.
 * Mei's level 7 talent, "Skating Away", adds an additional effect to her "Icing" ability, granting herself and nearby allied heroes 50 Physical Armor for 3 seconds when the ability ends.
 * Malthael's level 13 talent, "Ethereal Existence", adds an additional effect to his "Reaper's Mark" trait, granting him 10 Physical Armor for every enemy hero afflicted by it, up to a maximum of 30.
 * Samuro's level 4 talent, "Deflection", adds an additional effect to his "Advancing Strikes" trait, granting him and his images 30 Physical Armor while it is active.
 * Stukov's level 4 talent, "Biotic Armor", adds an additional effect to his "Healing Pathogen" ability, granting 10 Physical Armor to allied Heroes affected by it, increasing to 75 Physical Armor for 2.5 seconds after detonating Bio-Kill Switch.
 * Yrel's level 1 talent, "Dauntless", grants her 35 Physical Armor for 2.5 seconds after casting a Basic Ability.

Generic Talents

 * The level 1 talent, "Block", grants 75 Physical Armor against an enemy hero's basic attack every 5 seconds, can store 2 charges. Multiple heroes have variants of it.

Talents that lower Physical Armor

 * Nova's level 7 talent, "Anti-Armor Shells", makes her Basic Attacks reduce the Physical Armor of heroic targets by 15 for 3 seconds.
 * Samuro's level 1 talent, "Way of the Blade", adds an additional effect to this "Critical Strike" ability, reducing 5 Physical Armor of enemy Heroes hit by Samuro's Critical Strikes, from either his main body or his clones, stacking up to 3 times, for 2.25 seconds.
 * Tassadar's level 13 talent, "Feedback", adds an additional effect to his "Psionic Storm" ability, reducing 25 Physical Armor of enemy heroes being hit by it while Resonance Beam is affecting them.

Abilities that grant Spell Armor

 * Anub'arak's ability, "Harden Carapace", grants him 40 Spell Armor while active.
 * His level 1 talent, "Nerubian Armor", increases the Spell Armor by 20.
 * Brightwing's ability, "Pixie Dust", grants the target 25 Spell Armor for 3 seconds.
 * Her level 13 talent, "Pixie Power", increase Pixie Dust's Spell Armor to 50.
 * Valeera's level 10 heroic ability, "Cloak of Shadows", grants her 75 Spell Armor for 1.5 seconds.

Talents that grant Spell Armor

 * Anub'arak's level 1 talent, "Legion of Beetles", adds an additional effect to his "Scarab Host" trait, granting beetles 30 Spell Armor.
 * Artanis' level 13 talent, "Phase Bulwark", adds an additional effect to his "Shield Overload" trait, granting him 50 Spell Armor while it is active, and for 2 seconds after.
 * Blaze's level 16 talent, "Juggernaut Plating", grants him 50 Spell Armor for 3 seconds.
 * The Butcher's level 7 talent, "Meat Shield", adds an additional effect to his "Ruthless Onslaught" ability, granting him 50 Spell Armor for 2.5 seconds when it hits an enemy hero.
 * Dehaka's level 1 talent, "Enduring Swarm", adds an additional effect to his "Dark Swarm" ability, granting him 50 Spell Armor while it is active.
 * Diablo's level 1 talent, "Soul Shield", grants him 25 plus 50% of Diablo's current Soul as Spell Armor for 4 seconds.
 * Fenix's level 13 talent, "Dampening Field", grants him 30 Spell Armor while he has a shield from Shield Capacitor.
 * Genji's level 7 talent, "Cyber Shield", adds an additional effect to his "Cyber Agility" trait, granting him 50 Spell Armor for 2.5 seconds.
 * Gul'dan's level 13 talent, "Fel Armor", adds an additional effect to his "Fel Flame" ability, granting him 40 Spell Armor for 2.5 seconds when it hits an enemy hero.
 * Illidan's level 13 talent, "Sixth Sense", adds an additional effect to his "Evasion" ability, granting him 75 Spell Armor against the next 2 sources of Spell Damage while it is active.
 * Imperius' level 20 talent, "Impervious", grants him 75 Spell Armor and Unstoppable for 3 seconds.
 * Kerrigan's level 13 talent, "Psionic Barrier", grants her 20 Spell Armor for 4 seconds for every enemy Hero she hits with Primal Grasp.
 * Li-Ming's level 1 talent, "Force Armor", adds an additional effect to her "Magic Missiles" ability, granting her 50 Spell Armor against the next source of Spell Damage when hitting enemy heroes, can store 4 charges.
 * Lunara's level 13 talent, "Greater Spell Shield", grants her 75 Spell Armor for 3 seconds upon taking Spell Damage, 30 second cooldown.
 * Mei's level 4 talent, "Crystallize", grants her 40 Spell Armor during "Cryo-Freeze" and for 1 second afterwards.
 * Malthael's level 13 talent, "Shroud of Wisdom", grants him 50 Spell Armor for 4 seconds after a 2 seconds delay.
 * Murky's level 4 talent, "Tufferfish", adds an additional effect to his "Pufferfish" ability, granting the Pufferfish 50 Spell Armor.
 * Nazeebo's level 13 talent, "Superstition", grants him 40 Spell Armor. Being hit by heroic Basic Attacks removes this bonus for 3 seconds.
 * Orphea's level 13 talent, "Determination", adds an additional effect to her "Shadow Waltz" ability, grants her 50 Spell Armor stacking up to 2 times after dashing.
 * Probius' level 4 talent, "Photon Barrier", adds an additional effect to his "Photon Cannon" ability, granting him 30 Spell Armor while it is alive and powered.
 * Samuro's level 4 talent, "Mirage", adds an additional effect to his "Mirror Image" ability, granting him and his images 40 Spell Armor against the next 2 sources of Spell Damage.
 * Tassadar's level 13 talent, "Oracle", grants him 30 Spell Armor while standing still.
 * Thrall's level 13 talent, "Spirit Shield", grants him 50 Spell Armor for 2.5 seconds upon taking Spell Damage on a 45 second cooldown. "Frostwolf Resilience" reduces this cooldown by 10 seconds when activated.
 * Tychus' level 13 talent, "Neosteel Coating", grants him 75 Spell Armor for 4 seconds.
 * Tyrande's level 7 talent, "Kaldorei Resistance", adds an additional effect to her "Light of Elune" ability, granting the target 10 Spell Armor for 2 seconds, stacking up to 2 times.
 * Valla's level 13 talent, "Gloom", grants her 20 Spell Armor. It can be activated to consume all Hatred and grant additional 3 Spell Armor per Hatred for 5 seconds.
 * Zarya's level 13 talent, "Spell Barrier", adds an additional effect to her "Personal Barrier" ability, granting her 75 Spell Armor for 3 seconds when it expires or breaks.

Generic Talents

 * The level 13 talent, "Spell Shield", grants 50 Spell Armor for 3 seconds upon taking Spell Damage, 30 second cooldown.

Talents that lower Spell Armor

 * Chromie's level 18 talent, "Unravelling", adds an additional effect to her "Slowing Sands" heroic ability, lowering Slowed enemy Heroes's Spell Armor by 10 every .25 seconds, up to 30.
 * Deathwing's level 7 talent, "Death Drop", adds an additional effect to his "Dragonflight" mount, reducing the Spell Armor of enemy heroes hit by his landing by 15 for 6 seconds.
 * Falstad's level 7 talent, "BOOMerang", adds an additional effect to his "Hammerang" ability, causing the explosion to lower the Spell Armor of enemies hit by 15 for 3 seconds.
 * Tassadar's level 10 heroic, "Archon", causes his basic attacks to lower the Spell Armor of enemy heroes by 20 for 2 seconds.

Abilities that ignore Armor

 * Any attack or ability that deals Percent damage ignores Armor completely.
 * Cassia's level 20 talent, "Titan's Revenge", makes her Basic Attacks ignore Armor.
 * Orphea's level 16 talent, "Dead Magic", makes her Basic Attacks that consume Chaos ignore Armor.
 * Zul'jin's level 16 talent, "No Mercy!", adds an additional effect to his "Grievous Throw" ability, making his Basic Attacks against marked enemy heroes ignore Armor.