Illusions

Illusions

 

Changelogs

 

Default buff icon
▶️ Spawn sound
▶️ Death sound

“

▶️ One of me ain't enough. — Windranger

”

Illusions are imperfect, weaker copies of heroes, created by abilities or items. They look like and are mostly treated like a hero, but are impaired, as they usually have incoming and outgoing damage penalties, dealing less damage and taking more damage than heroes. They are incapable of casting abilities or using active item abilities, and also have some passive abilities disabled. They also may not drop or pick up items or runes. Illusions yield a little gold and experience based on the hero's level. They do not soak up any experience and gold. Illusions cannot level up, the gold from last hits they make goes to their owners, and do not interfere with kill streaks or counters.

Illusions can be created from an allied, enemy, or the own hero. The illusions copies its appearance, level, all attributes, attack values, defensive values (e.g. base armor and base magic resistance) and abilities on their current level. All items owned by the main hero are copied as well, including all their stats (although some effects of abilities and items are disabled for illusions).

All illusions deal 60% less damage against buildings, making them weaker in pushing. This reduction stacks multiplicatively with the outgoing damage reduction values most illusions have, and also multiplicatively with the damage reduction hero damage does against structure armor type. However, due to the fact that illusions are based on heroes, their damage scales together with the heroes, making them still a significant pushing tool, especially in later phases of a match.

All illusions are invulnerable for 0.1 seconds as they spawn, regardless of which ability that spawns or creates them. Illusions also always play the same spawn sound upon spawning, which are only audible to allies, and the same death sound upon dying in any way, including upon expiring.

Visual Appearance

Camouflaged illusions as they appear to allies and enemies.

Illusions are always visually distinguishable to their allies, with an extra texture layer on their model and their unit portrait, and a creep health bar. Allied Illusions also have a duration indicator the left of their health bar.

For enemy illusions, this depends on the source ability. Some abilities create illusions that the enemy also sees as an illusion, with the extra texture layer and a creep health bar (but without the duration indicator), however, some other abilities create illusions that are camouflaged.

To the enemy, a camouflaged illusion looks identical to the hero they are based on. They do not show their illusion texture, and display the regular hero health bar with all its components (hero icon, player name, mana bar, other extra icons like the Battle Pass badges). Allies see them as illusions normally.

There are 7 different illusion textures.

Appearance
Portrait
Abilities	Default	Blink Fragment1 Fiend's Grip2 Phantasm Chaos Bolt2 Decoy2 Illusionist's Cape Manta Style Illusion Rune Mirror Image Disruption Haunt Shadow Step1 Dispersion2	Wall of Replica Vengeance Aura1 3	Reflection Conjure Image	Doppelganger	Spirit Lance Doppelganger Juxtapose	Dark Portrait1	Normal Punch2
Camouflaged	-	Yes	No	No	Yes	Yes	No	No

¹ Requires Aghanim's Scepter.

² Requires Aghanim's Shard.

³ The Vengeance Illusion always uses the hero health bar, for enemies and for allies, but is otherwise distinguishable.

Illusion Creating Abilities

Main Article: Collision Size

Collision size also affects illusion-creating sources. Since two heroes (or units) cannot be in the same coordinates without phased movement, and they will be pushed 58-distance away upon losing phased movement, regardless of the collision sizes. In the following table, Phantom Lancer and Chaos Knight have a collision size of 18 and 27 respectively. The illusions will spawn at different distances depending on the affected target's collision size as follows:

Caster Collision Size	Target Collision Size	Pushed Distance
(18)	(27)	58
(27)	(18)	58
Both Caster and Target have the same collision size.		58
If the target's collision size is not the same as the caster's, and it is greater than the caster's collision size. expr TargetCollision > CasterCollision [?]		87

Example

Chaos Knight casts Chaos Bolt on an enemy Marci and Siege Creep. How far the Phantasm illusion will be spawned next to both of these enemy targets?

Chaos Knight Collision Size: 27

Marci Collision Size: 27

Siege Creep Collision Size: 40

Since both heroes' collision sizes are the same, the Phantasm illusion will spawn 58-distance away when Marci does not have phased movement.

For the Siege Creep, the Phantasm illusion will spawn 87-distance away instead.

Sources

Illusion Creating Sources

• Anti-Mage – Counterspell^2b
• Anti-Mage – Counterspell Ally
• Anti-Mage – Blink Fragment
• Bane – Fiend's Grip^2a
• Dark Seer – Normal Punch
• Dark Seer – Wall of Replica
• Hoodwink – Decoy
• Illusion Rune – Illusion
• Manta Style – Mirror Image
• Naga Siren – Mirror Image
• Phantom Lancer – Spirit Lance
• Phantom Lancer – Doppelganger
• Phantom Lancer – Juxtapose
• Shadow Demon – Disruption
• Spectre – Shadow Step
• Spectre – Haunt
• Terrorblade – Reflection
• Terrorblade – Conjure Image

¹ Requires talent.

^2a Requires Aghanim's Scepter.

^2b Requires Aghanim's Shard.

Strong Illusions

Strong Illusions behave the same as regular illusions but cannot be instantly killed by abilities as listed here.

Strong Illusion Creating Sources

• Chaos Knight – Chaos Bolt^2b
• Chaos Knight – Phantasm
• Grimstroke – Dark Portrait
• Morphling – Morph^2a
• Vengeful Spirit – Vengeance Aura^2a

¹ Requires talent.

^2a Requires Aghanim's Scepter.

^2b Requires Aghanim's Shard.

Stats

Illusions

Ability
Innate

Affects
Self

This unit is an illusion. Its stats, level, ability levels, and items are all set upon creation and do not adapt to the original hero.

Against Reinforced: 0.4

Bonus Attack Damage Negation: 100%

Bonus Armor Negation: 100%

Bonus Magic Resistance Negation: 100%

Modifiers [?]

modifier_property_bonusdamageoutgoing_percentage

Undispellable

modifier_property_damageoutgoing_percentage_illusion_amplify

Undispellable

Notes

• The following traits are copied from illusions based on the original hero:
  • All attributes, Attribute Gain per Level, and the hero's Primary Attribute.
    • Does not copy temporary attribute changes
  • Health, Mana and its regeneration values.
  • Base Attack Damage, Attack Range, Attack Speed, Attack Animation and Projectile Speed.
  • Base Armor
  • Damage Block
  • Base Magic Resistance, Status Resistance and Slow Resistance.
  • Spell Damage Amplification
  • Turn Rate
  • Unit Size
  • Evasion
  • Vision
  • Talents, items, and passive abilities that provide the bonuses above.

• Only Total Attack Damage manipulation sources fully affects the illusion's main attack damage.
  • Deals 40% damage to buildings after all total attack damage manipulation sources. These values are innate to illusions and stack multiplicatively with Attack Classes.
  • Against Roshan, the illusions deal 20% total damage due to the Strength of the Immortal buff.
  • However, abilities from illusions deal full spell damage if they can be cast.

• Both the illusion's incoming damage multiplier and outgoing damage multiplier based on the abilities creating them are handled by the Damage Manipulation modifier instead.

Magic Resistance Bonuses

Some sources of magic resistance work with illusions and some do not. Magic resistance increasing abilities do not affect illusions, except for Fate's Edict and magic resistance increasing talents. However, in the HUD, magic resistance is always displayed as if they were fully affected.

The following magic resistance sources affect illusions:

Magic Resistance Sources Affecting Illusions

• Elder Titan – Natural Order
• Astral Spirit – Natural Order
• Ethereal Blade – Ether Blast
• Ghost Scepter – Ghost Form
• Leshrac – Nihilism¹
• Necrophos – Ghost Shroud
• Pugna – Decrepify

The following magic resistance sources do not affect illusions:

Magic Resistance Sources Not Affecting Illusions

• Ancient Apparition – Ice Vortex
• Grove Bow – Magic Amp
• Keeper of the Light – Solar Bind
• Nyx Assassin – Vendetta²
• Skywrath Mage – Ancient Seal
• Viper – Poison Attack

¹ Requires Aghanim's Scepter.

² Requires Aghanim's Shard.

Bounty

Illusions have a gold and experience bounty equal to two times their level. The gold bounty is granted to the player killing the illusion, while the experience is shared within the default experience area. However, the experience is only granted when the illusion is killed by a player. Expiring illusions, or illusions dying to lane creeps, towers, fountains or neutral creeps do not grant any experience.

Illusion bounty formula:

• expr
  2 * IllusionLVL

The following table shows their bounties on each level:

Level	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Gold	2	4	6	8	10	12	14	16	18	20	22	24	26	28	30	32	34	36	38	40	42	44	46	48	50	52	54	56	58	60

The following illusions grant a fixed 5 and 5_XP, regardless of their level:

• Spirit Lance
• Doppelganger
• Juxtapose (created by Phantom Lancer and from his illusions)
• Wall of Replica

Copying Buffs and Debuffs

Usually when an illusion is created, it usually does not copy the buffs and debuffs the original hero has.

There are some exceptions, however, Illusions copy the toggled On / Off statuses of items and of some abilities.

The following buffs are copied by illusions:

Buffs Copied Upon Illusion Creation

• Alchemist – Chemical Rage
• Armlet of Mordiggian – Unholy Strength²
• Dragon Knight – Elder Dragon Form
• Lone Druid – True Form
• Lycan – Shapeshift
• Lycan – Wolf Bite¹
• Moon Shard – Consume³
• Morphling – Attribute Shift
• Terrorblade – Metamorphosis⁴
• Troll Warlord – Berserker's Rage
• Undying – Flesh Golem

¹ Requires Aghanim's Scepter.

² Unholy Strength's buff, and effects appear copied but only the strength is actually copied. Read the stats section for more.

³ The buff is copied, but illusions are not granted the attack speed bonus. Only the bonus night vision is copied.

⁴ Although copying the modifier upon creation, the aura overrides it, so that their form reverts once no longer affected by the aura.

Attack Modifiers

Main Article: Attack Modifiers

Attack modifiers are modifiers which apply an effect to a unit's basic attacks. These effects can widely vary, from healing, to damaging or even disabling effects. Most of these modifiers have their own rules. Some attack modifiers work with illusions and some do not, while some of them work partially or have their values decreased for balancing purposes.

The following attack modifiers fully work for illusions:

Attack Modifiers Copied Upon Creation

• Abaddon – Curse of Avernus
• Brewmaster – Drunken Brawler
• Chaos Knight – Chaos Strike
• Crystalys – Critical Strike
• Daedalus – Critical Strike
• Dragon Knight – Elder Dragon Form³
• Drow Ranger – Marksmanship Split Shot^{1 2}
• Juggernaut – Blade Dance
• Legion Commander – Moment of Courage
• Luna – Moon Glaives
• Lycan – Shapeshift
• Lycan – Wolf Bite¹
• Mask of Madness – Lifesteal
• Medusa – Split Shot²
• Monkey King Bar – Pierce⁴
• Morbid Mask – Lifesteal
• Orb of Venom – Poison Attack
• Phantom Assassin – Coup de Grace
• Phantom Lancer – Juxtapose
• Satanic – Lifesteal
• Sniper – Take Aim
• Spectre – Desolate
• Templar Assassin – Psi Blades
• Troll Warlord – Fervor
• Venomancer – Poison Sting
• Vladmir's Offering – Vladmir's Aura
• Wraith King – Mortal Strike
• Wraith King – Vampiric Spirit

¹ Requires Aghanim's Scepter.

² The damage reductions of Marksmanship and Split Shot are the only reductions which affect illusions.

³ All 3 modifiers of Elder Dragon Form (Corrosive Breath, Splash Attack and Frost Breath) work for illusions.

⁴ Only the accuracy works for illusions.

Mana Break

Mana Break abilities or talents are copied by illusions from the original hero, illusions with Mana Break burns less mana than real heroes.

Mana Break Sources

• Anti-Mage – Mana Break
• Diffusal Blade – Manabreak
• Disperser – Manabreak

¹ Requires talent.

^2a Requires Aghanim's Scepter.

^2b Requires Aghanim's Shard.

Not Copied

These attack modifiers are not copied upon creation and do not work for illusions:

Attack Modifiers Not Copied Upon Creation

• Abyssal Blade – Bash
• Battle Fury – Cleave²
• Battle Fury – Quell
• Blight Stone – Lesser Corruption
• Bounty Hunter – Jinada
• Desolator – Corruption²
• Echo Sabre – Echo Strike
• Eye of Skadi – Cold Attack²
• Faceless Void – Time Lock
• Gleipnir – Chain Lightning
• Javelin – Pierce
• Kunkka – Tidebringer^{2 3}
• Lifestealer – Feast
• Maelstrom – Chain Lightning
• Magnus – Empower
• Meepo – Ransack
• Monkey King Bar – Pierce
• Mjollnir – Chain Lightning
• Monkey King – Jingu Mastery
• Quelling Blade – Quell
• Riki – Cloak and Dagger Backstab
• Sand King – Caustic Finale
• Skull Basher – Bash
• Slardar – Bash of the Deep
• Slark – Essence Shift
• Sniper – Headshot
• Spirit Breaker – Greater Bash
• Sven – Great Cleave
• Tiny – Grow
• Troll Warlord – Berserker's Rage Root
• Troll Warlord – Fervor
• Ursa – Fury Swipes
• Winter Wyvern – Arctic Burn
• Weaver – Geminate Attack

² The particle effects of these attack modifiers appear and their sounds play, but their effects are not applied.

³ Tidebringer is always on Autocast for illusions, so they proc whenever off cooldown, but none of its effects are applied.

Active Abilities

Illusions may not use active abilities and items, but they might inherit ongoing abilities from the original hero if the ability was cast before creating the illusion. Only a few abilities have different effect when the cast is an illusion.

Notable Differences

• Abaddon - Borrowed Time
  
  Even when the illusion is allowed to cast abilities, Borrowed Time still does not auto-activate when below 400 health.
• Batrider - Firefly
  
  When the casting illusion dies, the fire trail immediately disappears, instead of staying for its remaining duration.
• Chen - Holy Persuasion
  
  All persuaded units die instantly when the illusion dies.
• Doom - Infernal Blade
  
  Cannot be used by illusions at all. Attempting to cast this makes the illusion perform a regular attack.
• Earth Spirit - Enchant Remnant
  
  Illusions cannot cast this ability.
• Elder Titan - Astral Spirit
  
  When the illusion dies while having the Astral Spirit out, the Astral Spirit dies as well. It does not return.
• Enchantress - Nature's Attendants
  
  When the illusion dies, Nature's Attendants ends immediately, instead of continuing to heal nearby allies for the remaining duration.
• Leshrac - Diabolic Edict
  
  When the illusion dies, Diabolic Edict ends immediately, instead of continuing to damage nearby enemies for the remaining duration.
• Leshrac - Lightning Storm
  
  When the illusion dies, Lightning Storm immediately stops bouncing.
• Medusa - Mana Shield
  
  Although it can be toggled, Mana Shield does not work for illusions at all.
• Mirana - Moonlight Shadow
  
  Since the ability does not affect illusions, the casting illusion is not turned invisible.
• Nyx Assassin - Burrow
  
  Illusions cannot cast this ability.
• Ogre Magi - Unrefined Fireblast
  
  Illusions cannot cast this ability.
• Phantom Assassin - Stifling Dagger
  
  Only attack modifiers which work for the illusion can proc. This means Stifling Dagger cast by illusions can, for example, never bash.
• Phoenix - Supernova
  
  When the illusion dies or expires during Supernova, the Supernova does not end, continuing to damage and then stun enemies at the end.
• Rubick - Fade Bolt
  
  When the illusion dies, Fade Bolt immediately stops bouncing.
• Sand King - Epicenter
  
  When the illusion dies, Epicenter ends immediately, instead of continuing to release its pulses.
• Spirit Breaker - Charge of Darkness
  
  Even though Greater Bash does not work for illusions, Charge of Darkness still applies the bash radius.
• Spirit Breaker - Nether Strike
  
  Even though Greater Bash does not work for illusions, Nether Strike still applies the bash radius.
• Timbersaw - Chakram
  
  Illusions cannot cast the blue Chakram.
• Treant Protector - Eyes In The Forest
  
  Illusions cannot cast this ability.
• Tusk - Walrus Kick
  
  Illusions cannot cast this ability.
• Visage - Soul Assumption
  
  Illusions do not have the charge meter above them.
• Zeus - Arc Lightning
  
  When the illusion dies, Arc Lightning immediately stops bouncing.

Casting Fake Abilities

Within a certain conditions, some abilities causes all illusions owned by the illusion creator within certain range from the target will also fake cast the ability, while the real hero casts the ability.

This is mainly for camouflaging the real hero and their illusions. The illusions still cannot use any active abilities.

These illusions have the following behavior:

• The illusion play the whole cast animation and cast the fake ability at the same time the real ability is cast.
• When illusions currently are not having any order and are standing still, they all turn to face the target and cast the ability.
• When canceling the cast (S), the illusions still play the full cast animation, but do not release the fake ability.
• When illusions are moving or attacking, they continue to do so and do not turn to face the target. They still play the cast animation, overriding their move or attack animations.
• They play the whole cast animation and release their fake ability at the same time the real ability is released.
• These fake abilities do not interact with anything.

Fake Abilities Cast by Illusions

• Chaos Knight – Chaos Bolt
• Naga Siren – Ensnare
• Naga Siren – Rip Tide
• Phantom Lancer – Spirit Lance

Passive Abilities

These passive abilities are fully functional for illusions:

Functional Passive Abilities

• Abyssal Blade – Damage Block
• Aether Lens – Aethereal Focus
• Axe – Counter Helix
• Bristleback – Warpath¹
• Crimson Guard – Damage Block
• Earthshaker – Aftershock
• Enchantress – Untouchable
• Faceless Void – Chronosphere²
• Medusa – Split Shot
• Naga Siren – Rip Tide
• Night Stalker – Hunter in the Night
• Octarine Core – Cooldown Reduction
• Ogre Magi – Multicast
• Phantom Assassin – Blur
• Phantom Lancer – Phantom Rush
• Shadow Fiend – Necromastery
• Storm Spirit – Overload
• Treant Protector – Nature's Guise
• Vanguard – Damage Block
• Visage – Gravekeeper's Cloak

¹ Warpath does proc when illusions cast abilities. Also, since Warpath always applies a stack on all owned illusions by default, illusions casting abilities get 2 stacks per cast.

² This is an innate ability. All illusions owned by Faceless Void are not frozen in time during Chronosphere.

Partially Functional Passive Abilities

• Bloodseeker – Thirst¹
• Bristleback – Bristleback²
• Dragon Knight – Dragon Blood³
• Tidehunter – Kraken Shell²
• Timbersaw – Reactive Armor³
• Viper – Corrosive Skin⁴

¹ The health restore and max movement speed limit works, but not the movement speed bonus, hero detection and vision.

² Only the damage block/reduction works.

³ Only the health regeneration bonus works.

⁴ Only the damage per second and slow bonus works.

These passive abilities do not work for illusions:

Not Functional Passive Abilities

• Abaddon – Borrowed Time¹
• Alchemist – Greevil's Greed
• Anti-Mage – Counterspell¹
• Lua error: Found no Cargo data for "Bloodstone - Mana Battery".
• Centaur Warrunner – Retaliate
• Drow Ranger – Marksmanship
• Gyrocopter – Side Gunner
• Infused Raindrops – Magical Damage Block
• Linken's Sphere – Spellblock
• Meepo – Divided We Stand
• Pangolier – Lucky Shot
• Pudge – Flesh Heap
• Razor – Storm Surge
• Shadow Fiend – Requiem of Souls¹
• Slark – Shadow Dance¹
• Spectre – Dispersion
• Wraith King – Reincarnation

¹ The passive components of these active abilities do not work for illusions.

Aura

These auras are bestowed by illusions upon creation:

Bestowed Auras Upon Creation

• Assault Cuirass – Assault Aura
• Beastmaster – Inner Beast
• Buckler – Buckler Aura²
• Centaur Warrunner – Retaliate Aura
• Crystal Maiden – Arcane Aura
• Elder Titan – Natural Order¹
• Guardian Greaves – Guardian Aura
• Headdress – Regeneration Aura
• Luna – Lunar Blessing
• Lycan – Feral Impulse
• Mekansm – Mekansm Aura
• Necrophos – Heartstopper Aura
• Pipe of Insight – Insight Aura
• Radiance – Burn^{2 3}
• Ring of Basilius – Basilius Aura
• Shadow Fiend – Presence of the Dark Lord
• Shiva's Guard – Freezing Aura
• Underlord – Atrophy Aura⁴
• Undying – Plague Aura
• Vengeful Spirit – Vengeance Aura
• Vladmir's Offering – Vladmir's Aura

¹ Despite the illusions not having an Astral Spirit, their Natural Order always bestows the armor reduction and the magic resistance reduction aura.

² Illusions copy the toggled On / Off status of these auras.

³ Burn is weaker on illusions, dealing 1.5 damage per second, instead of 60.

⁴ Illusions bestow the Atrophy Aura. When an enemy dies within aura range of an illusion, Underlord gets the damage bonus, if he owns the illusion, otherwise the illusion itself gets the damage.

These auras are not bestowed by illusions upon creation:

Not Bestowed Auras

• Drow Ranger – Marksmanship Agility Aura
• Gem of True Sight – True Sight
• Lycan – Shapeshift Speed and Crit Aura
• Terrorblade – Metamorphosis Aura
• Wraith King – Wraith Delay Aura¹

¹ Requires Aghanim's Scepter.

Ability Interactions

Most abilities treat illusions like regular heroes. However, some abilities have a different effect or interact in a different way with illusions. A few abilities do not affect illusions at all.

Instant Kill

These abilities instantly destroy illusions when used on them, unless the illusions are strong illusions.

Instant Killing Illusion Abilities

• Dagon – Energy Burst
• Dazzle – Poison Touch⁴
• Disruptor – Glimpse
• Lion – Hex
• Lion – Mana Drain
• Muerta – Parting Shot
• Pudge – Meat Hook
• Pugna – Life Drain⁵
• Scythe of Vyse – Hex
• Shadow Shaman – Hex

¹ Instantly kills the target upon landing if it is not a hero or a clone.

² Requires a talent.

³ Requires Aghanim's Scepter.

⁴ Requires Aghanim's Shard.

⁵ Kills illusions on the first tick, not upon cast.

Creep Duration

These abilities uses the non-hero or creep duration on them, instead of hero duration:

Treats Illusions as Non-Hero Units

• Abaddon – Borrowed Time Aura¹
• Ancient Apparition – Ice Blast
• Bloodseeker – Thirst
• Chen – Hand of God
• Dark Seer – Wall of Replica
• Earth Spirit – Rolling Boulder
• Enchantress – Enchant
• Guardian Greaves – Guardian Aura
• Invoker – E.M.P.
• Io – Spirits
• Kunkka – Ghostship
• Mirana – Moonlight Shadow
• Nature's Prophet – Wrath of Nature
• Pudge – Flesh Heap
• Riki – Tricks of the Trade
• Skywrath Mage – Concussive Shot
• Skywrath Mage – Mystic Flare
• Slark – Essence Shift
• Slark – Pounce
• Smoke of Deceit – Disguise
• Spectre – Haunt
• Spectre – Dispersion²
• Spectre – Shadow Step¹
• Undying – Decay
• Urn of Shadows – Soul Release
• Visage – Soul Assumption
• Witch Doctor – Paralyzing Cask

¹ Requires Aghanim's Scepter.

² Requires Aghanim's Shard.

Ward Units

These ward units require the creep amount of attacks to destroy them, instead of the hero amount when attacked by an illusion.

Treats Illusions as Non-Hero Units

• Phoenix – Supernova
• Pugna – Nether Ward
• Undying – Tombstone

No Effect

These abilities do not affect, cannot target, or do not work against illusions:

No Effect On Illusions

• Alchemist – Greevil's Greed¹
• Alchemist – Aghanim's Scepter Synth²
• Broodmother – Spin Web²
• Necrophos – Heartstopper Aura
• Observer and Sentry Wards – Share Wards²
• Rubick – Spell Steal
• Shadow Fiend – Necromastery¹
• Tango – Devour²
• Templar Assassin – Psi Blades
• Underlord – Atrophy Aura¹
• Viper – Nethertoxin

¹ These abilities ignore the death of illusions, so killing them does not make these abilities apply their effects.

² These abilities do not have a target or do not place their buffs or debuffs on illusions.

Other Interactions

These abilities have different interactions with illusions. They either do not treat them as heroes, or apply different effects on them.

Other Interactions

• Bounty Hunter - Track
  
  Illusions do not provide any bounty when dying while tracked.
• Bristleback - Warpath
  
  Warpath places its buff/grants a stack to the caster and all illusions under the caster's control.
• Buildings - Backdoor Protection
  
  Illusions deal 75% less damage against protected buildings, instead of 25% like any other unit. They also deal 60% less damage against unprotected buildings.
• Elder Titan - Astral Spirit
  
  Damages illusions, but does not count them for the damage and speed buff.
• Legion Commander - Overwhelming Odds
  
  Deals additional damage based on current health to illusions. Illusions are treated as creeps.
• Legion Commander - Duel
  
  Does not grant victory damage when defeating an illusion in a Duel.
• Medusa - Mystic Snake
  
  Does not drain mana from illusions.
• Roshan - Strength of the Immortal
  
  Grants 80% damage resistance against attacks from illusions.
• Silencer - Glaives of Wisdom
  
  Does not steal intelligence from illusions, neither when they are attacked nor when they die.
• Storm - Dispel Magic
  
  Deals damage against illusions on top of dispelling.
• Tusk - Snowball
  
  Allied illusions cannot enter a Snowball. Only Tusk's own illusions can. Added illusions do not increase the damage.

Recent Changes

Main Article: Illusions/Changelogs

<div> <div class="updatetablehead"> <div id="version">Version</div><div id="description">Description</div> </div> <div class="updatetablebody">

7.34

• U
  The Spirit Bear is no longer restricted from having illusions.

7.30c

• The Vengeance Illusion now uses a hero health bar, instead of the regular unit health bar.

7.20

• Illusions incoming damage amplification is now calculated as very last, after all other damage-based calculations are done.

</div> </div>

Mechanics Main Heroes Unit Type (Heroes / Clones / Illusions) Complexity Attributes Table Buyback Level Roles Gold Experience Animations Stats Armor Attributes ( Strength / Agility / Intelligence) / Universal) Health & Mana (HP Regen & MP Regen) Magic Resistance Movement Speed / Slow Resistance Status Resistance Turn Rate Misc Creep Controling Death / Denying Vision Unit Size (Collision Size / Bound Radius / Selection Box / Model Size) Gib Type / Shades Adjectives Buildings Towers / Barracks / Ancient / Fountain Effigy Neutral Buildings (Outposts / Watchers / Twin Gates / Lotus Pools) Abilities Type Active / Passive / Autocast Aura Accuracy / Evasion Channeling Damage Barrier Damage Block Damage Manipulation Damage Over Time Talents Teleport Targeting Area No Target Point Unit Vector Combinations Casting Cast Range / Motion Buffer Cast Animation (Cast Point + Backswing) Cooldown Reduction (Flat / Current Flat / Percentage) Reset Charge-based Runes Bounty Rune Water Rune Wisdom Rune Power Runes ( Amplify Damage Rune / Arcane Rune / Haste Rune / Illusion Rune / Invisibility Rune / Regeneration Rune / Shield Rune) Misc Random Distribution Transformation Attack Damage Attack Damage Instant Attack Heroes Attack Classes Attack Range (Acquisition Range) Attack Speed (BAT / Interval) Damage Types (Physical / Magical / Pure / Instant Kill) Flags (HP Removal / No-reflection / No-Spell-Lifesteal / No-Spell-Amplification) Projectile Speed Spell Damage (Outgoing / Incoming) Modifiers Bash Cleave / Splash Corruption Critical Strike Lifesteal / Spell Lifesteal Mana Break On-hit Effects Misc Damage Instance Animation / Orb Walking Status Effects Disables Cyclone Disabling Orders Forced Movement (Knockback) / Upward Movement Fear (Hypnosis) Hide Hex Root Leash Stun Sleep Taunt Movement Move Speed Slow Flying Movement Phased / Tree Walk / Unobstructed Movement Other Attack Immune / Non-targetable Attack Speed Slow Debuff Immunity Spell Immunity Invulnerability Invisibility Blind Break Disarm Ethereal Silence Mute Trap Dispels Basic Strong Death Items Mechanics Courier Sharing / Selling Disassemble Recipes Neutral Item Drop