Here is a list of damage types made by me. I have gathered all info about damage types from this forum and some cases were tested personally. Also, clogon helped me a lot in making this guide more accurate.
To simplify the understanding (which sometimes leads to less information about damage type details) I have divided damage types in 4 categories:
1. Normal, which is reduced by hero's Armor and can be blocked by Shield Block items/skills (Stout Shield, Vanguard...)
2. Magic, which is reduced by hero's Spell Resistance.
3. Mixed - which is reduced both by Spell Resistance and Armor - meaning this is most non-dangerous type of damage
4. Neutral - not reduced by anything - most dangerous type of damage
Note: Do not confuse 'Magic' damage type in my list with 'Damage type = Magic' that is widely used in changelog and some guides. Read my legend carefully to understand what I mean by saying 'Magic'.
Note2: Do not ask me for clarification on whether the information on some specific spell is correct. I see no point in this guide if users would still ask me to confirm info on every spell. If you have found out that the information is incorrect/outdated then provide a replay and I will update the guide. Otherwise I'm gonna ignore clarification requests.
Below there is a list of all heroes (version 6.58b) and their skills, colored accordingly to the damage-type list above. To make it easier to search for a specific hero, I have used a bold style on the most commonly used part of the hero name/class. Additionaly next formatting styles are applied to show how will the skill work against units with magic-immunity (Avatar):
- Skill name - does not work (if it's an ulti, then there will be only cast animation without any effect... except lost mana for casting it
)
- Skill name - works, but without dealing any damage (some effects not related to damage - slow, stun, etc.)
- Skill name - works as usual (don't care if he has Avatar
Effect name- this effect does not work on Avatared units. Used when skill is partially negated by magic-immunity to specify the exact effects that doesn't work.
Shendelzare Silkwood (Vengeful Spirit) - Magic Missile, Terror, Command Aura, Nether Swap
Zeus (Lord of Olympia) - Arc Lightning, Lightning Bolt, Static Field, Thundergod's Wrath
Aiushtha (Enchantress) - Enchant, Untouchable, Nature's Attendants, Impetus
Morphling (Morphling) - Waveform, Adaptive Strike, Morph, Replicate
Rylai Crestfall (Crystal Maiden) - Frost Nova, Frostbite, Brilliance Aura, Freezing Field
Sven (Rogueknight) - Storm Bolt, Great Cleave, Toughness Aura, God's Strength
Slithice (Naga Siren) - Mirror Image, Ensnare, Critical Strike, Song of the Siren
Raigor Stonehoof (Earthshaker) - Fissure, Enchant Totem, Aftershock, Echo Slam(echo damage)
Rikimaru (Stealth Assassin) - Smoke Screen, Blink Strike, Backstab, Permanent Invisibility
Syllabear (Lone Druid) - Spirit Bear(Entangle, Demolish, damage on death), Rabid, Synergy, True Form (BattleCry, One¹)
Lina Inverse (Slayer) - Dragon Slave, Light Strike Array, Ultimate, Laguna Blade
Yurnero (Juggernaut) - Blade Fury, Healing Ward, Blade Dance, Omnislash
Nortrom (Silencer) - Curse of the Silent, Glaives of Wisdom, Last Word, Global Silence
Rooftrellan (Treant Protector) - Nature's Guise, Eyes in the Forest, Living Armor, Overgrowth
Darchrow (Enigma) - Malefice, Conversion, Midnight Pulse, Black Hole
Ezalor (Keeper of the Light) - Illuminate, Mana Leak, Chakra Magic, Spirit Form (Blinding Light)
Ulfsaar (Ursa Warrior) - Earthshock, Overpower, Fury Swipes, Enrage
Aggron Stonebreaker (Ogre Magi) - Fireblast, Ignite, Bloodlust, Multi Cast
Boush (Tinker) - Laser, Heat Seeking Missile, March of the Machines, Rearm
Furion (Prophet) - Sprout, Teleportation, Force of Nature, Wrath of Nature
Azwraith (Phantom Lancer) - Spirit Lance, Doppelwalk, Juxtapose, Phantom Edge
Tiny (Stone Giant) - Avalanche, Toss, Craggy Exterior, Grow
Squee Spleen and Spoon (Goblin Techies) - Land Mines, Stasis Trap, Suicide Squad, Attack!, Remote Mines
Chen (Holy Knight) - Penitence, Test of Faith, Holy Persuasion, Hand of God
Rexxar (Beastmaster) - Wild Axes, Call of the Wild: Quilbeast(Poison Attack), Beast Rage, Primal Roar(side damage and
Jakiro (Twin Head Dragon) - Dual Breath, Ice Path, Auto Fire(
Razzil Darkbrew (Alchemist) - Acid Spray, Unstable Concoction, Goblin's Greed, Chemical Rage
Mirana Nightshade (Priestess of the Moon) - Starfall, Elune's Arrow, Leap, Moonlight Shadow
Raijin Thunderkeg (Storm Spirit) - Static Remnant, Electric Vortex, Overload(
Huskar (Sacred Warrior) - Inner Vitality, Burning Spear(hp cost), Berserker's Blood, Life Break(self damage, slow)
Lanaya (Templar Assassin) - Refraction, Meld, Psi Blades, Psionic Trap
Puck (Faerie Dragon) - Illusory Orb, Wanning Rift, Phase Shift, Dream Coil
Rattletrap (Clockwerk Goblin) - Battery Assault, Power Cog: Shock(damage, knock back, mana removal), Rocket Flare, Hookshot(Movement,
Kunkka (Admiral) - Torrent, Tidebringer(Bonus Damage, Cleave), X Marks The Spot, Ghost Ship
Alleria (Windrunner) - Shackleshot, Powershot, Windrunner, Focus Fire
Luna Moonfang (Moon Rider) - Lucent Beam, Moon Glaive, Lunar Blessing, Eclipse
Kardal Sharpeye (Dwarven Sniper) - ScatterShot, Headshot(
Jah'rakal (Troll Warlord) - Berserker Rage(bash damage), Blind, Fervor, Rampage
Rhasta (Shadow Shaman) - Forked Lightning, Voodoo, Shackles, Mass Serpent Ward
Rigwarl (Bristleback) - Viscous Nasal Goo, Quill Spray, Bristleback(auto Quill Spray), Warpath
Magnix (Pandaren Brewmaster) - Thunder Clap, Drunken Haze, Drunken Brawler, Primal Split: Storm(WW dmg), Earth, And Fire
Bradwarden (Centaur Warchief) - Hoof Stomp, Double Edge(self-damage), Return, Great Fortitude
Gondar (Bounty Hunter) - Shuriken Toss, Jinada, Wind Walk (backstab damage), Track
Knight Davion (Dragon Knight) - Breathe Fire, Dragon Tail, Dragon Blood, Elder Dragon Form(Corrosive Breath, Splash, and Frost Breath)
Magina (Anti-Mage) - Mana Break, Blink, Spell Shield, Mana Void
Traxex (Drow Ranger) - Frost Arrows, Silence, Trueshot Aura, Marksmanship
Purist Thunderwrath (Omniknight) - Purification, Repel, Degen Aura, Guardian Angel
The Scourge
Terrorblade (Soul Keeper) - Soul Steal, Conjure Image, Metamorphosis, Sunder²
Kel'Thuzad (Lich) - Frost Nova, Frost Armor, Dark Ritual, Chain Frost(
Krobelus (Death Prophet) - Carrion Swarm, Silence, Witchcraft, Exorcism
Lion (Demon Witch) - Impale, Voodoo, Mana Drain, Finger of Death
Lesale Deathbringer (Venomancer) - Venomous Gale, Poison Sting, Plague Ward, Poison Nova
Magnus (Magnataur) - Shockwave, Empower, Mighty Swing, Reverse Polarity
Visage (Necro'lic) - Grave Chill, Soul Assumption, Gravekeeper's Cloak, Raise Revenants
Nessaj (Chaos Knight) - Chaos Bolt, Blink Strike, Critical Strike, Phantasm
Banehallow (Lycanthrope) - Summon Wolves, Howl, Feral Heart, Shapeshift(Critical Strike)
Black Arachnia (Broodmother) - Spawn Spiderlings, Spin Web, Incapacitating Bite(
Mortred (Phantom Assassin) - Stifling Dagger, Blink Strike, Blur, Coup de Grace
Medusa (Gorgon) - Split Shot, Chain Lightning, Mana Shield, Purge
Balanar (Night Stalker) - Void, Crippling Fear, Hunter in the Night, Darkness
King Leoric (Skeleton King) - Storm Bolt, Vampiric Aura, Critical Strike, Reincarnation
Lucifer (Doom Bringer) - Devour, Scorched Earth, LVL? Death(bonus damage), Doom
Anub'arak (Nerubian Assassin) - Impale, Mana Burn, Spiked Carapace, Vendetta(backstab damage)
Slardar (Slithereen Guard) - Sprint(take more damage*¹), Slithereen Crush, Bash, Amplify Damage
Akasha (Queen of Pain) - Shadow Strike, Blink, Scream of Pain, Sonic Wave
Bone Clinkz (Bone Fletcher) - Strafe, Searing Arrows, Wind Walk, Death Pact
Darkterror (Faceless Void) - Time Walk, Backtrack, Time Lock, Chronosphere
Viper (Netherdrake) - Frenzy(take more damage*¹), Poison Attack, Corrosive Skin, Viper Strike
Razor (Lightning Revenant) - Frenzy(take more damage*¹), Chain Lightning, Unholy Fervor, Storm Seeker
N'aix (Lifestealer) - Rage, Feast, Open Wounds, Infest
Leshrac the Malicious (Tormented Soul) - Split Earth, Diabolic Edict, Lightning Storm, Pulse Nova
Pugna (Oblivion) - Nether Blast, Decrepify, Nether Ward, Life Drain
Leviathan (Tidehunter) - Gush, Kraken Shell, Anchor Smash, Ravage
Atropos (Bane Elemental) - Enfeeble, Brain Sap, Nightmare(killing blow*), Fiend's Grip
Rotund'jere (Necrolyte) - Death Pulse, Heartstopper Aura, Sadist, Reaper's Scythe
Pudge (Butcher) - Meat Hook(
Barathrum (Spiritbreaker) - Charge of Darkness, Empowering Haste, Greater Bash, Nether Strike
Anub'seran (Nerubian Weaver) - Watcher, Shukuchi, Geminate Attack, Time Lapse
Nevermore (Shadow Fiend) - Shadowraze, Necromastery, Presence of the Dark Lord, Requiem of Souls
Crixalis (Sand King) - Burrowstrike, Sand Storm, Caustic Finale(AoE damage), Epicenter
Mogul Kahn (Axe) - Berserker's Call, Battle Hunger, Counter Helix, Culling Blade³(killing)/Culling Blade(non-killing)
Strygwyr (Bloodseeker) - Bloodrage(lose hp), Blood Bath, Strygwyr's Thirst, Rupture
Abaddon (Lord of Avernus) - Death Coil(self damage), Aphotic Shield, Frostmourne, Borrowed Time
Mercurial (Spectre) - Spectral Dagger, Desolate, Dispersion, Haunt
Vol'Jin (Witch Doctor) - Paralyzing Cask(
Harbinger (Obsidian Destroyer) - Arcane Orb, Astral Imprisonment, Essence Aura, Sanity's Eclipse
Demnok Lannik (Warlock) - Fatal Bonds(
Meepo (Geomancer) - Earthbind, Poof, Geostrike, Divided We Stand
Dazzle (Shadow Priest) - Poison Touch, Shallow Grave, Shadow Wave, Weave
Azgalor (Pit Lord) - Firestorm, Pit of Malice, Expulsion, Dark Rift
Dirge (Undying) - Decay, Soul Rip (drain damage), Tombstone (Deathstrike), Flesh Golem (Plague, slow)
Ish'kafel (Dark Seer) - Vacuum, Ion Shell, Surge, Wall of Replica
Kael (Invoker) - Quas, Wex, Exort, Invoke: EMP⁴, Ice Wall, Ghost Walk, others
¹ One makes you receive 10% of original damage (be it spell damage, normal or unreduced) and the rest 90% of that damage will be received as spell damage and splitted between you and your bear. So if both you and your bear are under the One effect, then you will receive 10% of original damage and 45% of original damage as spell damage. If only you have the One buff, then you will receive 10% of original damage and 90% of original damage as spell damage.
² Sunder - exchanges percentage of hp/max_hp between 2 heroes (one of which is you). If someone of them is magic-immune, then his hp will not change, while hp of his "partner" will change as usual.
This leads to simple conclusions:
1.Cast Sunder on enemy-Avatar - simply raise/lower your own hp to opponent's hp percentage.
2.Cast Sunder while being Avatar - no change in your own hp, and only your opponent will have his hp % changed to your hp %.
3.If both "partners" are magic-immune, then Sunder does no effect.
³ Culling Blade (killing) is actually reduced by armor, but it deals 100 million damage, so even with every amount of damage mitigation in the game, it will still kill anything that is below the HP threshold. The red color was chosen as more appropriate, so people wouldn't think they can buy armor to counter Axe's ulti.
⁴ EMP deals magic damage if it is about to kill a target, in other cases (where the enemy does not die) it uses direct HP removal.
* When you cast Nightmare on a target, you deal 5 damage. The target goes to sleep and is invulnurable for ~1 second. On the FIRST damage tic, if the target already has less than or equal to 20 HP, Nightmare is removed (The target wakes up and lives). Else, the target will lose 20 hp per tic (unreduced) untill they are at 20 hp or less. Then Nightmare will deal 50 damage (hence the 'killing blow'). This means that it is possible for a Hero to survive the killing blow if he has enough spell resistance (perhaps only Anti-Mage).
*¹ Extra damage taken will be of the same type as the incoming damage. For example, if you were hit by normal damage, then the extra damage will be normal too and will be reduced by armor (but not by shield blocking skills though, because they are only applied for the incoming damage). Since the type of this damage depends on the type of the source damage and is reduced/unreduced same as the source damage, no color was chosen to avoid confusion
If those who helped me with this list are not mistaking
, the list now contains correct information about all skills.
Alchemist
Batrider
Bone Fletcher
Bristleback
Centaur Warchief
Clockwerk
Crystal Maiden
Dark Seer
Doom Bringer
Dragonus
Drow Ranger 
Ember Spirit
Enigma
Furion
Goblin Shredder
Gyrocopter
Invoker
Juggernaut
Keeper of the Light
Kunkka
Lanaya
Legion Commander
Lina Inverse
Lion
Luna
Magnataur
Medusa
Morphling
Naga Siren
Nerubian Assassin
Necrolyte
Ogre Magi
Phantom Assassin
Priestess of the Moon
Puck
Pugna
Queen of Pain
Razor
Shadow Fiend
Sniper
Storm Spirit
Techies
Tinker
Troll Warlord
Viper
Visage
Warlock
Animal Courier
Bloodstone
Ethereal Blade
Eye of Skadi
Flying Courier
Mjollnir
Tranquil Boots
Sange & Yasha
Veil of Discord
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