Illusions



Illusions are non-perfect copies of another unit. To enemies they look exactly the same as the original unit (with the exception of Wall of Replica), but to allies the illusions are very distinct from the original one (illusions have a different color than the original unit, usually blue). Illusions run equally fast and attack almost as fast but their attacks usually deal much less damage and they usually take much more damage. With the exception of Haunt and Reflection whose illusions will only attack one unit, illusions are controllable by whichever player they are created by. There are two types of illusion abilities: Mirror Image type and Single Target type.

Mirror Image
Mirror Image type illusions are created at the caster's location and are mixed up with the hero so that enemies will not know which is which. These skills also provide a short period of invulnerability and dispel most buffs and some disables. The following abilities are Mirror Image type:



Single Target
Single Target type illusions are spawned at a point, usually as part of another ability. There is no invulnerability or buff removal provided when casting these abilities. The following abilities are Single Target type:



Passive abilities Illusions can use

 * Evasion
 * Critical Strike (it should be noted that the red number is before the illusion reduction)
 * Feedback (only works on melee illusions)
 * Movement Speed bonus
 * Attribute Bonus (Strength, Agility and Intelligence)
 * Health or Mana
 * True Sight
 * Radiance's Burn Damage (the damage does not stack with other Radiance auras)
 * Magic Resistance from abilities, and from base Magic Resistance
 * Quelling Blade's bonus damage to creeps
 * Attack range changes
 * Axe's Counter Helix
 * Dragon Knight's Corrosive Breath
 * Spectre's Desolate
 * Luna's Moon Glaive
 * Enchantress' Untouchable
 * Viper's Corrosive Skin
 * Riki's Permanent Invisibility
 * Medusa's Split Shot (only when Split Shot is active before the illusions spawns)
 * Slark's Shadow Dance movement speed increase (when not visible to the enemies), however, not the regeneration.

Passive abilities Illusions cannot use

 * Raw Damage, Armor or Attack Speed increase
 * Health or Mana regeneration, including Lifesteal (regardless of what the animation may show)
 * Most Unique attack modifiers, with the exception of Feedback on melee illusions and others mentioned above
 * Cleave
 * Bash, including Monkey King Bar (regardless of what the animation may show)
 * Damage Block (Vanguard, Poor Man's Shield, etc)
 * Magic Resistance from items (Cloak, Hood of Defiance, or Pipe of Insight)
 * Sniper's Headshot
 * Riki's Backstab
 * Greater and Lesser Maim from items like Sange and Yasha, Sange, and Heaven's Halberd

Auras on Illusions
Illusions will bestow any auras that the original hero has. However, with the exception of auras that increase Attack Speed or Movement Speed, they usually will not benefit from them. (source?)