Health percent damage

Health Percent Damage, or just Percent Damage, is a special category of Spell Damage that resembles other MOBAs' 'True' or 'Pure' damage type. Abilities and Talents that deal damage based on a percentage of the target's maximum, current or missing Health do Percent Damage.

Percent Damage is flagged to ignore damage modifiers entirely. This means that percentage-based effects will deal the raw amount of damage regardless of the amount of damage Buffs or Debuffs on the attacker or the Armor state of the target. Effects that completly prevent or absorb damage, such as Protected status or Shields, however, are still able to mitigate Percent Damage.

Being classified as Spell Damage, it still interacts with associated effects, such as Arthas's "Anti-Magic Shell", Blaze's "Juggernaut Plating" or Spell Lifesteal. Percent damage instances do not, however, consume charges of Spell Block.

Percent Damage is capped to 36.5 damage per percent of Health for an instance of damage, Scaling by 4% per attacker's level. The cap is set to limit Percent Damage's effectiveness against high-HP Battleground Objectives such as Vehicles or the Immortals on Battlefield of Eternity. There are Heroes who can hit this limit in some cases, but in a normal game situation it is usually high enough to not affect Heroes of roughly the same level.

List of Abilities dealing Health Percent Damage
The following Abilities and Talents deal Percent damage.

Basic Abilities

 * Leoric's Basic Ability "Drain Hope" periodically deals damage to the attached Hero based on their maximum Health.
 * Malthael's Trait, "Reaper's Mark", causes his Basic Attacks to deal additional damage over time to non-Structure enemies based on the target's maximum Health.
 * Tychus's Trait, "Minigun", causes his Basic Attacks to deal bonus damage to Heroes based on their maximum Health for a short period upon activation.

Heroic Abilities

 * Greymane's Heroic Ability, "Cursed Bullet", deals damage to the first enemy non-Vehicle Hero in its path based on their current Health.
 * Kharazim's Heroic Ability, "Seven-Sided Strike", periodically deals damage to the highest Health Hero in its area based on the their maximum Health.
 * Malthael's Heroic Ability, "Last Rites", deals damage to the target non-Vehicle Hero after a delay based on their missing Health. The damage dealt by this ability is not capped.

Talents

 * The generic Talent, Giant Killer, causes the Hero's Basic Attacks to deal bonus damage to the target Hero based on their maximum Health.
 * Ana's level 7 talent, "Night Terrors", causes "Sleep Dart" to deal bonus damage to Heroes upon waking based on their maximum Health.
 * Artanis's level 16 talent, "Titan Killer", causes his Basic Attacks to deal bonus damage to Heroes based on their maximum Health, empowered while using "Twin Blades."
 * Azmodan's level 16 talent, "Total Annihilation", causes "Globe of Annihilation" to deal bonus damage to Heroes based on their maximum Health.
 * Brightwing's level 4 talent, "Unstable Anomaly", causes "Polymorph" to deal damage upon expiring to the target Hero and Heroes in an area around the target based on their maximum Health.
 * The Butcher's level 13 talent, "Savage Charge", causes "Ruthless Onslaught" to deal bonus damage to the target Hero upon impact based on their maximum Health.
 * Cassia's level 16 talent, "Martial Law", causes her Basic Attacks to deal bonus damage to Heroes based on their maximum Health, empowered against disabled Heroes.
 * Cho's level 4 talent, "Uppercut", causes "Surging Fist" to deal bonus damage to Heroes based on their maximum Health.
 * D.Va's level 4 talent, "Rush-down", causes "Boosters" to deal bonus damage to Heroes based on their maximum Health and heal her based on the bonus damage dealt.
 * Diablo's level 20 talent, "Lord of Terror", upon activation deals damage in an area to Heroes based on their maximum Health and heals him based on damage dealt.
 * Fenix's level 16 talent, "Offensive Cadence", causes every 3rd Basic Attack against Heroes while "Repeater Cannon" is active to deal bonus damage based on the target's maximum Health.
 * Gall's level 13 talent, "Searing Shadows", causes "Shadowflame" to deal bonus damage to Heroes based on their maximum Health.
 * Gazlowe's level 4 talent, "Hyperfocus Coils", causes "Deth-Lazor" and "Xplodium Charge" to deal bonus damage to Heroes based on their maximum Health and heal him based on the bonus damage dealt.
 * Gazlowe's level 16 talent, "Overklock", causes his Basic Attacks to deal bonus damage to Heroes based on the target's maximum Health.
 * Greymane's level 16 talent, "Alpha Killer", causes his "Worgen Form" Basic Attacks to deal bonus damage to Heroes based on their maximum Health.
 * Hanzo's level 16 talent, "Giant Slayer", causes "Scatter Arrow" and his Basic Attacks to deal bonus damage to Heroes based on their maximum Health.
 * Hogger's level 16 talent, "Headbanger", causes "Staggering Blow" to deal bonus damage to Heroes that collid with terrain based on their maximum Health.
 * Illidan's level 16 talent, "Fiery Brand", causes his every 3rd Basic Attack against the same Hero to deal bonus damage based on their maximum Health.
 * Imperius's level 1 talent, "Burn the Impure", causes consuming "Valorous Brand" marks to deal bonus damage to the target Hero based on their maximum Health.
 * Kael'thas's level 7 talent, "Burned Flesh", causes "Flamestrike" to deal bonus damage to Heroes based on their maximum Health, if it hit 2 or more Heroes.
 * Leoric' level 13 talent, "Spectral Leech", causes his Basic Attacks to deal bonus damage to the target Hero based on their maximum Health and heal him based on bonus damage dealt.
 * The Lost Vikings' level 13 talent, "Nordic Attack Squad", causes their Basic Attacks to deal bonus damage to Heroes based on their maximum Health when close to each other.
 * Lunara's level 16 talent, "Invigorating Spores", causes her Basic Attacks against Heroes afflicted with 3 stacks of "Natures Toxin" to deal bonus damage based on their maximum Health.
 * Maiev's level 4 talent, "Sudden Vengeance", causes "Spirit of Vengeance" to deal damage to Heroes in an area based on their maximum Health upon teleporting to the spirit.
 * Maiev's level 16 talent, "Vengeful Knives", causes "Fan of Knives" to deal bonus damage to Heroes based on their maximum Health, empowered by dealing damage to enemies between casts.
 * Mal'Ganis's level 7 talent, "Will of Tichondrius", causes the final slash of "Fel Claws" to deal bonus damage to Heroes based on their maximum Health and heal him for the damage dealt.
 * Malthael's level 4 talent, "Throwing Shade", causes "Death Shroud" to deal bonus damage to Heroes upon impact based on their maximum Health.
 * Malthael's level 16 talent, "Mortality", causes "Wraith Strike" to deal bonus damage to Heroes based on their maximum Health.
 * Mephisto's level 16 talent, "Static Field", causes "Lightning Nova" to deal bonus damage to Heroes upon reaching its maximum damage bonus based on their maximum Health.
 * Mephisto's level 20 talent, "Consumed by Hatred", causes "Consume Souls" to deal bonus damage to Heroes based on their missing Health.
 * Murky's level 16 talent, "Wrath of Cod", causes "Pufferfish" to deal bonus damage over time to Heroes based on their maximum Health.
 * Orphea's level 16 talent, "Bond of Anguish", causes "Shadow Waltz" to deal bonus damage to Heroes based on their maximum Health and heal her based on the bonus damage dealt.
 * Ragnaros's level 16 talent, "Giant Scorcher", causes "Empower Sulfuras" to deal bonus damage over time to Heroes based on their maximum Health.
 * Raynor's level 16 talent, "Bounty Hunter", causes his Basic Attacks empowered by his trait to deal bonus damage to the target Hero based on their maximum Health.
 * Rehgar's level 16 talent, "Hunger of the Wolf", causes "Ghost Wolf" attacks to deal bonus damage to Heroes based on the target's maximum Health.
 * Sylvanas's level 1 talent, "Overwhelming Affliction", causes her Basic Attacks against slowed Heroes to deal bonus damage to the target based on their maximum Health.
 * Sonya's level 16 talent, "Giant Slammer" causes "Seismic Slam" and her Basic Attacks to deal bonus damage to Heroes based on their maximum Health and heal her based on the damage dealt.
 * Stitches's level 4 talent, "Serrated Edge", causes "Hook" to deal bonus damage to Heroes based on their maximum Health.
 * Tassadar's level 16 talent, "Thermal Lance", causes "Shock Ray" to deal bonus damage to the first Hero in its path based on their maximum Health.
 * Thrall's level 1 talent, "Rolling Thunder", causes his Basic Attacks to deal bonus damage to Heroes marked by "Chain Lightning" based on the target's maximum Health and heal him based on the bonus damage dealt.
 * Thrall's level 7 talent, "Ancestral Wrath", grants him an active that deals damage over time to a target Hero based on the their maximum Health and heals him based on the damage dealt.
 * Thrall's level 16 talent, "Alpha Wolf", causes his Basic Attacks for a short period to deal bonus damage to Heroes hit by "Feral Spirit" based on the target's maximum Health.
 * Tracer's level 10 talent, "Quantum Spike", causes "Pulse Bomb" to deal bonus damage to Heroes based on their maximum Health.
 * Tychus's level 16 talent, "Sizzlin' Attacks", causes his Basic Attacks to deal bonus damage to Heroes based on their maximum Health.
 * Tychus's level 16 talent, "Titan Grenade", causes "Frag Grenade" to deal bonus damage to Heroes based on their maximum Health.
 * Tyrande's level 16 talent, "Empower", causes "Sentinel" to deal bonus damage to Heroes based on their maximum Health.
 * Valla's level 16 talent, "Manticore", causes her every 3rd Basic Attack against the same Hero to deal bonus damage to the target based on their maximum Health.
 * Varian's level 13 talent, "Juggernaut", causes "Charge" to deal bonus damage to the target Hero based on their maximum Health.
 * Xul's level 1 talent, "Backlash", causes "Bone Armor" upon expiring to deal damage to Heroes around him based on their maximum Health.
 * Yrel's level 16 talent, "Templar's Verdict", causes "Righteous Hammer" to deal bonus damage to Heroes based on their maximum Health.
 * Zagara's level 16 talent, "Corrosive Saliva", causes her summons' Basic Attacks to deal bonus damage to Heroes based on their maximum Health.
 * Zul'jin's level 16 talent, "No Mercy!", causes his Basic Attacks against targets marked with "Grievous Throw" to deal bonus damage to Heroes based on their maximum Health.