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[[File:UI-Character-ResistanceIcons.png|right]]
 
[[File:UI-Character-ResistanceIcons.png|right]]
'''Resistance''' is a combat statistic that mitigates incoming [[magic]] damage and effects. Magic spells from the following five [[Magic_schools_(WoW)|school]]s can be resisted from magical resistance: [[Fire]], [[Frost]], [[Arcane]], [[Nature]], and [[Shadow]]. There is no resistance stat for [[Holy]], and as such no players nor NPCs can resist Holy spells. A character's current resistance score to each school is advertised on the character sheet.
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'''Resistance''' was a combat statistic that mitigated incoming [[magic]] damage and effects. Magic spells from the following five [[Magic_schools_(WoW)|school]]s could be resisted from magical resistance: [[Fire]], [[Frost]], [[Arcane]], [[Nature]], and [[Shadow]]. There was no resistance stat for [[Holy]], and as such no players nor NPCs could resist Holy spells. A character's current resistance score to each school was advertised on the character sheet.
   
In [[PvE]], resistance is highly situational and is typically only needed for certain [[boss]] encounters. The first one of this type was [[Ragnaros]], famous for requiring significant fire resistance on all raid members. Most recently, in Wrath of the Lich King, {{mob|boss=|Sapphiron}} is made much easier with Frost resistance gear (although this is not necessary).
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In [[PvE]], resistance was highly situational and was typically only needed for certain [[boss]] encounters. The first one of this type was {{mob|boss=|Ragnaros}}, famous for requiring significant fire resistance on all raid members. More recently, in {{wotl-inline}} Wrath of the Lich King, {{mob|boss=|Sapphiron}} was made much easier with Frost resistance gear (although this was not necessary).
In [[PvP]], resistance is helpful against spellcasters, although [[Resilience]] is generally considered to be a more useful stat when choosing between the two.
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  +
In [[PvP]], resistance was helpful against spellcasters, although [[Resilience]] was generally considered to be a more useful stat when choosing between the two.
   
 
== In Mists of Pandaria ==
 
== In Mists of Pandaria ==
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== Effective Resistance and Average Mitigation ==
 
== Effective Resistance and Average Mitigation ==
The effective resistance rating of the target is calculated as follows:
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The effective resistance rating of the target was calculated as follows:{{fact}}
 
effective resistance rating = Rb + max((Lt - Lc) * 5, 0) - min(P, Rb)
 
effective resistance rating = Rb + max((Lt - Lc) * 5, 0) - min(P, Rb)
 
 
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P - caster spell penetration
 
P - caster spell penetration
   
In PvE boss fights, the player level is usually equal to or less than the boss level, and no [[spell penetration]] is in effect. Therefore, in this situation, it's safe to assume that the player's effective resistance is the same as the base resistance (from the character sheet).
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In PvE boss fights, the player level was usually equal to or less than the boss level, and no [[spell penetration]] was in effect. Therefore, in this situation, it was safe to assume that the player's effective resistance was the same as the base resistance (from the character sheet).
   
Note that this formula renders level 83 bosses as having 15 magical resistance against level 80 player attacks. Unlike all other magical resistance in the game, this resistance from level difference cannot be overcome by spell penetration.
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Note that this formula rendered level 83 bosses as having 15 magical resistance against level 80 player attacks. Unlike all other magical resistance in the game, this resistance from level difference could not be overcome by spell penetration.
   
The percentage of magical damage that is mitigated on average is calculated by the following equation (note that this has changed in Wrath):
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The percentage of magical damage that was mitigated on average was calculated by the following equation (note that this has changed in {{wotlk-inline}} Wrath of the Lich King):{{fact}}
 
Damage reduction percentage = 100% * effective resistance rating / ( K + effective resistance rating )
 
Damage reduction percentage = 100% * effective resistance rating / ( K + effective resistance rating )
   
For level 80 mobs this constant K is 400. For level 83 boss mobs K is believed to be 510. <ref name="elitistjerksWotLK">{{ref web
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For level 80 mobs this constant K was 400. For level 83 boss mobs K was believed to be 510.<ref name="elitistjerksWotLK">{{ref web
 
|url=http://elitistjerks.com/f15/t44675-resistance_mechanics_wotlk/
 
|url=http://elitistjerks.com/f15/t44675-resistance_mechanics_wotlk/
 
|title=Resistance Mechanics in WotLK - Elitist Jerks
 
|title=Resistance Mechanics in WotLK - Elitist Jerks
Line 33: Line 34:
   
 
== Binary Resist and Non-Binary Resist ==
 
== Binary Resist and Non-Binary Resist ==
Spell resistance is the second of two rolls to determine whether or not a spell is resisted. ([[Spell hit]] is the first roll.) The spell resistance roll will calculate in one of two different ways: one way for [[Binary Spell]]s, another way for non-Binary spells. Non-binary spells are spells which only deal damage (like [[Fireball]] or [[Shadow Bolt]]). Binary spells are spells which deal a [[debuff]] (like [[Frost Nova]] or [[Vampiric Embrace]]) or, for some other reason, must take full effect or no effect at all.
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Spell resistance was the second of two rolls to determine whether or not a spell was resisted. ([[Spell hit]] was the first roll.) The spell resistance roll would calculate in one of two different ways: one way for [[Binary Spell]]s, another way for non-Binary spells. Non-binary spells were spells which only dealt damage (like {{ability|Fireball}} or {{ability|Shadow Bolt}}). Binary spells were spells which dealt a [[debuff]] (like {{ability|Frost Nova}} or {{ability|Vampiric Embrace}}) or, for some other reason, needed to take full effect or no effect at all.
   
 
=== For binary spells ===
 
=== For binary spells ===
Resistance reduces the chance for the binary spell to land by a certain percentage. Spell hit will not reduce this chance. It is assumed that this percentage is exactly the damage reduction percentage given above.
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Resistance reduced the chance for the binary spell to land by a certain percentage. Spell hit would not reduce this chance. It was assumed that this percentage was exactly the damage reduction percentage given above.{{fact}}
   
 
=== For non-binary spells ===
 
=== For non-binary spells ===
Resistance increases the chance to suffer only a fraction of the spell's normal damage. As of Wrath of the Lich King, the possible percentages of damage resisted are weighted in sections of 0%, 10%, 20%, ..., 100% averaging to the same overall damage mitigation.<ref name="elitistjerksWotLK" /> However only the closest three or four sections will ever occur at a given resistance value. This allows a sufficiently high resistance to guarantee a certain resist percentage, even in the worst case. [[DoT]] spells are now considered non-binary and the partial resistance calculation is applied on each tick.
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Resistance increased the chance to suffer only a fraction of the spell's normal damage. As of Wrath of the Lich King, the possible percentages of damage resisted were weighted in sections of 0%, 10%, 20%, ..., 100% averaging to the same overall damage mitigation.<ref name="elitistjerksWotLK" /> However only the closest three or four sections would ever occur at a given resistance value. This allowed a sufficiently high resistance to guarantee a certain resist percentage, even in the worst case. [[DoT]] spells were considered non-binary and the partial resistance calculation was applied on each tick.
   
The probability of an x% resistance is given by the following formula (AR is the average resistance calculated above):
+
The probability of an x% resistance was given by the following formula (AR is the average resistance calculated above):{{fact}}
   
 
P(x) = 50% - 250%*|x - AR|
 
P(x) = 50% - 250%*|x - AR|
   
If the probability is less than 0, it cannot occur.
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If the probability was less than 0, it could not occur.
   
 
==== In Cataclysm ====
 
==== In Cataclysm ====
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|}
 
|}
   
Resistance can be obtained from [[buff]]s, [[potions]], certain class [[talents]], and gear. Racial abilities no longer grant magical resistance and instead grant a percentage chance to miss, as indicated by the table to the right. This chance to miss is added to the spell hit roll, and will not contribute to the non-binary damage mitigation.
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Resistance could be obtained from [[buff]]s, [[potions]], certain class [[talents]], and gear. Racial abilities no longer granted magical resistance and instead granted a percentage chance to miss, as indicated by the table to the right. This chance to miss was added to the spell hit roll, and would not contribute to the non-binary damage mitigation.
   
 
=== Stacking ===
 
=== Stacking ===
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* [[Elixir]]s and [[Flask]]s providing resistance do not stack with themselves.
 
* [[Elixir]]s and [[Flask]]s providing resistance do not stack with themselves.
   
;Example&#58;
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;Example:
 
In a group where [[Mark of the Wild]], [[Aspect of the Wild]], and [[Nature Resistance Totem]] is active, the group will only receive 130 Nature Resistance (either from the aspect or totem).
 
In a group where [[Mark of the Wild]], [[Aspect of the Wild]], and [[Nature Resistance Totem]] is active, the group will only receive 130 Nature Resistance (either from the aspect or totem).
   
 
== Effectiveness of Resistance ==
 
== Effectiveness of Resistance ==
The damage absorbed per point of damage/healing/tanking stat lost now decreases as resistance is gained, similar to armor. However guaranteeing a certain resistance percentage can be valuable, especially in fights with a large spike of elemental damage.
+
The damage absorbed per point of damage/healing/tanking stat lost decreased as resistance was gained, similar to armor. However guaranteeing a certain resistance percentage could be valuable, especially in fights with a large spike of elemental damage.
   
 
== See also ==
 
== See also ==

Latest revision as of 20:50, November 22, 2013

UI-Character-ResistanceIcons

Resistance was a combat statistic that mitigated incoming magic damage and effects. Magic spells from the following five schools could be resisted from magical resistance: Fire, Frost, Arcane, Nature, and Shadow. There was no resistance stat for Holy, and as such no players nor NPCs could resist Holy spells. A character's current resistance score to each school was advertised on the character sheet.

In PvE, resistance was highly situational and was typically only needed for certain boss encounters. The first one of this type was Boss 15 Ragnaros, famous for requiring significant fire resistance on all raid members. More recently, in Template:Wotl-inline Wrath of the Lich King, Boss 15 Sapphiron was made much easier with Frost resistance gear (although this was not necessary).

In PvP, resistance was helpful against spellcasters, although Resilience was generally considered to be a more useful stat when choosing between the two.

In Mists of Pandaria Edit

Mists-Logo-Small This section concerns content exclusive to Mists of Pandaria.

Spell resistance (elemental and otherwise) is being removed as a stat and mechanic in Mists-Logo-Small Mists of Pandaria according to Ghostcrawler (Greg Street).[1] Zarhym later explains that stats being sacrificed to add resistance which was only meaningful in narrow situations was a big part in removing this mechanic from the game.[2]

Effective Resistance and Average Mitigation Edit

The effective resistance rating of the target was calculated as follows:[citation needed]

effective resistance rating = Rb + max((Lt - Lc) * 5, 0) - min(P, Rb)

Rb - target base resistance (as advertised on the character sheet)
Lt - target level
Lc - caster level
P  - caster spell penetration

In PvE boss fights, the player level was usually equal to or less than the boss level, and no spell penetration was in effect. Therefore, in this situation, it was safe to assume that the player's effective resistance was the same as the base resistance (from the character sheet).

Note that this formula rendered level 83 bosses as having 15 magical resistance against level 80 player attacks. Unlike all other magical resistance in the game, this resistance from level difference could not be overcome by spell penetration.

The percentage of magical damage that was mitigated on average was calculated by the following equation (note that this has changed in Wrath-Logo-Small Wrath of the Lich King):[citation needed]

Damage reduction percentage = 100% * effective resistance rating / ( K + effective resistance rating )

For level 80 mobs this constant K was 400. For level 83 boss mobs K was believed to be 510.[3]

Binary Resist and Non-Binary Resist Edit

Spell resistance was the second of two rolls to determine whether or not a spell was resisted. (Spell hit was the first roll.) The spell resistance roll would calculate in one of two different ways: one way for Binary Spells, another way for non-Binary spells. Non-binary spells were spells which only dealt damage (like [Fireball] or [Shadow Bolt]). Binary spells were spells which dealt a debuff (like [Frost Nova] or [Vampiric Embrace]) or, for some other reason, needed to take full effect or no effect at all.

For binary spells Edit

Resistance reduced the chance for the binary spell to land by a certain percentage. Spell hit would not reduce this chance. It was assumed that this percentage was exactly the damage reduction percentage given above.[citation needed]

For non-binary spells Edit

Resistance increased the chance to suffer only a fraction of the spell's normal damage. As of Wrath of the Lich King, the possible percentages of damage resisted were weighted in sections of 0%, 10%, 20%, ..., 100% averaging to the same overall damage mitigation.[3] However only the closest three or four sections would ever occur at a given resistance value. This allowed a sufficiently high resistance to guarantee a certain resist percentage, even in the worst case. DoT spells were considered non-binary and the partial resistance calculation was applied on each tick.

The probability of an x% resistance was given by the following formula (AR is the average resistance calculated above):[citation needed]

P(x) = 50% - 250%*|x - AR|

If the probability was less than 0, it could not occur.

In Cataclysm Edit

Cataclysm-Logo-Small This section concerns content exclusive to Cataclysm.

Partial resists no longer occur against bosses.[4]

In Burning Crusade Edit

Bc icon This section concerns content exclusive to The Burning Crusade.

In The Burning Crusade, the percent resisted had a chance to be 0%, 25%, 50%, 75%, or 100%.[5] The probabilities were weighted such that the average damage mitigated worked out to the same percentage as with binary spells.

Sources of Resistance Edit

Race School Value
Official horde mini-icon Blood Elf All + 2% miss
Official alliance mini-icon Draenei Shadow + 2% miss
Official alliance mini-icon Dwarf Frost + 2% miss
Official alliance mini-icon Gnome Arcane + 2% miss
Official alliance mini-icon Human -- --
Official alliance mini-icon Night Elf Nature + 2% miss
Official horde mini-icon Orc -- --
Official horde mini-icon Tauren Nature + 2% miss
Official horde mini-icon Troll -- --
Official horde mini-icon Forsaken Shadow + 2% miss

Resistance could be obtained from buffs, potions, certain class talents, and gear. Racial abilities no longer granted magical resistance and instead granted a percentage chance to miss, as indicated by the table to the right. This chance to miss was added to the spell hit roll, and would not contribute to the non-binary damage mitigation.

Stacking Edit

The following list contains sources of resistance and stacking information. Each line will stack with other lines.

Example

In a group where Mark of the Wild, Aspect of the Wild, and Nature Resistance Totem is active, the group will only receive 130 Nature Resistance (either from the aspect or totem).

Effectiveness of Resistance Edit

The damage absorbed per point of damage/healing/tanking stat lost decreased as resistance was gained, similar to armor. However guaranteeing a certain resistance percentage could be valuable, especially in fights with a large spike of elemental damage.

See also Edit

References Edit

  1. ^ Blizz Ghostcrawler 2012-03-02. Dev Watercooler – Mists of Pandaria Stat Changes. Official World of Warcraft Community site (US).
       Blizz Ghostcrawler 2012-03-02. Coffee With the Devs — Mists of Pandaria Stat Changes. Official World of Warcraft Community site (EU).
  2. ^ Blizz Zarhym 2012-03-06. #154 - Elemental Damage Should Matter. Official Mists of Pandaria forum (US).
  3. ^ a b Elitist Jerks. Resistance Mechanics in WotLK - Elitist Jerks. Retrieved on 2009-12-15.
  4. ^ ieatpaperbag 2011-12-05. Combat Guide for Cata [12/01/2011]. ElitistJerks.com Rogues forum.
  5. ^ Blizz Blizzard Official US site. Resistances. Retrieved on 2007-09-05.

External links Edit


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