Spell Immunity

Info

Mechanics

Visage under the effect of Black King Bar   Item   Changelogs     Black King BarB A powerful staff imbued with the strength of giants. Cost3975 (1375) Bought FromArmor Active Avatar Bonus +10 Strength+24 Attack damage Disassemble? No Alert allies? No Recipe

Spell immunity is a status effect (also known as modifier). Most spells in the game first check whether or not the unit has the spell immunity modifier on. If the modifier is present, single target spells cannot target the unit at all, while area of effect spells ignore the unit and already ongoing effects may stop affecting it. Be that as it may, some spells (and most ultimates) pierce spell immunity and can fully target and affect spell immune units.

Usually, a spell either fully pierces spell immunity, or it is fully blocked. Be that as it may, there are a few exceptions to this rule. Whether or not a spell pierces spell immunity is noted down in the description boxes of each ability, right below the ability name.

When a unit turns spell immune while a projectile from an ability is already flying towards it, the projectile has no effect upon impact if the spell it originates from does not pierce spell immunity. The same applies to most, but not all delayed effects.

Spell immunity does not prevent regular attacks of any units. Be that as it may, some 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. For do get blocked, but not all of them. Generally, all critical strikes Critical strike is a passive ability that gives a chance to deal bonus damage on a successful attack. Contents 1 Mechanics 2 Stacking 3 Interaction with other passive abilities 4 Sources of chance-based critical strike , cleaves Cleave causes a melee unit s attacks to deal a portion of its damage in an area in front of it. Contents 1 Mechanics 2 Sources of cleave 3 Splash 4 Sources of splash 5 See and most bashes Bash is a passive ability that gives a unit a chance to stun its target on attack. Most bashes also include some extra damage upon proc. This damage is usually directly added to the attacking pierce spell immunity.

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Damage interaction

All sources of spell immunity also set the affected unit`s magic resistance Magic resistance is an attribute of heroes, similar to armor. Instead of reducing physical damage, it reduces magical damage. All heroes, except for Meepo and Visage, possess 25% magic resistance from their armor type. This to 100%. This leads to the affected unit taking no magical Damage is any means by which unit s current health can be reduced. Heroes, creeps, ancients, Roshan and fountains are all capable of dealing damage. Contents 1 Damage sources 1.1 Attack damage 1.2 Spell damage 2 damage at all, not even from spells which pierce spell immunity. Their damage technically still hits the unit, but gets reduced to 0. This means they may still proc on-damage effects, since some of them do react on 0 damage instances as well. It also means that abilities which ignore damage reduction (e.g. Blade Mail   Item   Old Abilities   Changelogs     Blade MailBL A razor-sharp coat of mail, it is the choice of selfless martyrs in combat. Cost2200 Bought FromArmor Active Damage Return Bonus +10 Intelligence+6 Armor+22 ) still react on it as well and apply their full effect.

Since magic resistance only affects magical damage, the unit is still fully affected by physical Damage is any means by which unit s current health can be reduced. Heroes, creeps, ancients, Roshan and fountains are all capable of dealing damage. Contents 1 Damage sources 1.1 Attack damage 1.2 Spell damage 2 and pure Damage is any means by which unit s current health can be reduced. Heroes, creeps, ancients, Roshan and fountains are all capable of dealing damage. Contents 1 Damage sources 1.1 Attack damage 1.2 Spell damage 2 damage. If a piercing ability uses one of those damage types, it does damage the unit.

If an ability does not pierce spell immunity, it does not attempt to damage spell immune units either, regardless of the damage type. In order for a spell to damage spell immune units, it must be set to pierce spell immunity, or it must be already affecting it in case of buffs/debuffs.

Dispelling

Most sources of spell immunity also dispel   Dispel   Removable buffs   Removable debuffs     A dispel is the term used for a forced removal of status effects. Dispels usually come together with other mechanics and are rarely seen as the target upon getting applied, removing all buffs or debuffs a basic dispel   Dispel   Removable buffs   Removable debuffs     A dispel is the term used for a forced removal of status effects. Dispels usually come together with other mechanics and are rarely seen as can remove. The dispel applied by spell immunities is usually a basic dispel. Be that as it may, not all of them apply a dispel, and some apply a strong dispel. A list of dispellable effects can be found here   Dispel   Removable buffs   Removable debuffs     Hero buffs Source Basic dispel Death  Abaddon - Aphotic Shield Yes Yes  Abaddon - Curse of Avernus (speed bonus) Yes Yes  Abaddon - Borrowed Time No Yes  Alchemist - .

Since dispels only remove buffs from enemies and debuffs from allies, it is possible for units to turn spell immune without losing any buffs or debuffs, be that as it may, since spell immunity cannot be applied to enemies, it cannot be done in a regular match. In this case, most buffs/debuffs still apply their effects normally. Only a few of them are inactive while the unit is spell immune. This means that a damage-over time spell may still damage the unit. If it is magical damage, it gets reduced to 0, which is enough to proc some on-damage effects.

Sources of spell immunity

These abilities grant spell immunity as a main part of the spell. They all apply a special form of dispel   Dispel   Removable buffs   Removable debuffs     A dispel is the term used for a forced removal of status effects. Dispels usually come together with other mechanics and are rarely seen as upon cast which removes a few more status effects than a regular dispel.

These abilities also apply spell immunity. Be that as it may, they only grant spell immunity as an extra layer of protection on top of the invulnerability Default buff iconPlay Error soundInvulnerability is a status effect that renders the target completely immune to all status effects and damage, except for most damage flagged as HPTechnology company Removal. Most friendly effects, such as healing they grant. This means their spell immunity only matters for spells which can affect invulnerable units (e.g. Diffusal Blade   Item   Changelogs     Diffusal BladeB An enchanted blade that allows the user to cut straight into the enemy s soul. Cost3150 (700) Bought FromArtifacts Active Purge Charges 8 Passive Manabreak Bonus +25/35 Agility+10/15 can target invulnerable units, but not spell immune units). These abilities do not apply the special spell immunity dispel like the above sources. Be that as it may, some of them still do dispel, independent from the spell immunity.

Some non-hero units gain permanent spell immunity by other means.

Spell immunity on allies

Every not-targeted spell, be it an area spell or a spell which affects self upon cast, pierces spell immunity for allies and self, with a very few exceptions listed below. All runes apply their effect on spell immune units.

Spell immunity on enemies

Spells interact very differently when facing spell immune enemies. Most of them cannot affect spell immune units, some of them can only affect them partially, and some fully pierce spell immunity.

Abilities that fully pierce Spell Immunity

Note that any magical damage is still blocked. All the effects (such as disables) will pierce Spell Immunity.