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{{redirect|Spell Power|the former [[mage]] talent|Spell Power (mage talent)}}
{{source needed}}
 
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{{redirect|Spellpower|other uses|Spellpower (disambiguation)}}
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'''Spell power''' is an [[attribute]] that increases the effect of [[spell]]s. Spell power increases the damage amount of damaging spells and the healing amount of healing spells.
   
  +
Your bonus damage and bonus healing from spell power do not usually apply directly to a spell. Each spell (or each component of each spell) which causes damage or healing has a [[spell power coefficient]] which determines how much damage or healing the spell does.
'''Spell power''' is an [[attribute]] that increases the effect of [[spell]]s. Spell power increases the damage amount of damaging spells and the healing amount of healing spells. Prior to [[Patch 3.0.2]], the attribute known as '''spell damage''' would only increase the effects of damaging spells. Healing spells were only increased by the '''healing''' attribute. As of Patch 3.0.2, '''spell power''' now effects both types of spells. Nevertheless, there are items which can increase your '''bonus healing''' independently of damage spells. Similarly, there are items which grant bonuses only to certain [[magic schools]] such as [[school#Fire|fire]] or [[school#Nature|nature]].
 
 
Information about spell power can be found on the '''Character''' tab of the [[Character info]] window under the '''Spell''' heading. The '''Bonus Damage''' attribute represents your spell power's contribution to general spell damage. Hovering your mouse over this attribute will show you the specific bonus damage for individual schools of damaging magic. These are typically equal to or greater than the base '''Bonus Damage''' attribute. The '''Bonus Healing''' attribute represents your spell power's contribution to healing spells. As with damage schools, this attribute is typically equal to or greater than your general '''Bonus Damage''' attribute.
 
 
Players often refer to this attribute as simply '''+damage''', '''+dmg''', or '''plus damage'''. For effects that target a specific school, it is similarly referred to by that school such as '''+fire'''. In particular, healers commonly refer to items with only a healing bonus as '''+healing'''.
 
   
 
==Sources of spell power==
 
==Sources of spell power==
Spell power is found primarily on equippable items, but can also be increased with potions, buffs and some class talents. Items with the following [[item suffix]]es will add spell damage or healing:
+
Spell power is found primarily on trinkets as an on use effect, but can also be increased with potions.
 
{| class="darktable" style="text-align:center"
 
|-
 
! Suffix || Effect || Note
 
|-
 
|| ..of Arcane Wrath || + [[Arcane]] damage ||
 
|-class="alt"
 
|| ..of Fiery Wrath || + [[Fire]] damage ||
 
|-
 
|| ..of Frozen Wrath || + [[Frost]] damage ||
 
|-class="alt"
 
|| ..of Healing || + [[Healing]] spells ||
 
|-
 
|| ..of Nature's Wrath || + [[Nature]] damage ||
 
|-class="alt"
 
|| ..of Shadow Wrath || + [[Shadow]] damage ||
 
|-
 
|| ..of Sorcery || '''+ Spell damage (not healing)'''{{fact}}<br />+ Stamina<br />+ Intellect || Found only on "Abyssal" items on summoned [[Silithus]] bosses.
 
|-class="alt"
 
|| ..of the Crusade || '''+ Spell damage and healing'''<br />+ Defense rating<br />+ Intellect || Introduced in [[The Burning Crusade]]
 
|-
 
|| ..of the Hierophant || '''+ Healing'''<br />+ Stamina<br />+ Spirit || Introduced in [[The Burning Crusade]]
 
|-class="alt"
 
|| ..of the Invoker || '''+ Spell damage and healing'''<br />+ Spell critical strike rating<br />+ Intellect || Introduced in [[The Burning Crusade]]
 
|-
 
|| ..of the Nightmare || '''+ Shadow damage'''<br />+ Stamina<br />+ Intellect || Introduced in [[The Burning Crusade]]
 
|-class="alt"
 
|| ..of the Physician || '''+ Healing'''<br />+ Stamina<br />+ Intellect || Introduced in [[The Burning Crusade]]
 
|-
 
|| ..of the Prophet || '''+ Healing'''<br />+ Spirit<br />+ Intellect || Introduced in [[The Burning Crusade]]
 
|-class="alt"
 
|| ..of the Sorcerer || '''+ Spell damage and healing'''<br />+ Stamina<br />+ Intellect || Introduced in [[The Burning Crusade]]
 
|}
 
 
All spell damage and healing gains [[stack]]. The total bonus is determined by adding individual bonuses from all equipped items, all buffs, and any talents. The total amount of spell damage and healing can be tracked on the [[character sheet]], under the ''Spell'' tab. ''Bonus Damage'' shows the total amount that applies to all schools. Mousing over ''Bonus Damage'' will break down the benefit by magical school, which includes items that only affect one school. ''Bonus Healing'' shows the amount that will be applied to healing spells.
 
 
==Spell coefficients ==
 
How much that spell power contributes to the effect of a spell varies from spell to spell. It is generally related to the [[cast time]] and/or the [[duration]] of the spell, and different categories of spells have different formulas for calculating their spell power. The portion of your spell power which is contributed to a particular spell is referred to as the [[spell power coefficient]]. It typically does not vary within the same spell, but the lowest and highest ranks of some spells have different casting times or durations, which can cause the coefficient to be different for those ranks.
 
 
There are 5 categories of spells used to calculate spell power coefficients: direct (instant-effect), over time, hybrid (has both a direct and an over time component), channeled, and area of effect. Some spells may belong to more than one category. For instance, channeled spells always act over time; area of effect (AoE) spells may be direct spells, or may be channeled over time. In general, the order of priority is: area of effect > channeled > hybrid > [direct | over time]. That is, a spell which is a channeled area of effect should be calculated as an AoE spell, rather than as channeled.
 
 
The coefficient can be determined by following some basic rules that are outlined in this section. It should be noted, however, that there are a number of exceptions to these rules, and that the true spell coefficient should be verified experimentally.
 
 
As of [[Patch 3.0.2]], it is necessary to multiply the results of the standard equations by a factor of approximately 1.88 for all healing spells. This is a proportionality constant introduced to account for the fact that bonus healing behaved differently from bonus spell damage prior to the patch, and took on a different range of values.
 
 
=== Direct (instant-effect) spells ===
 
Direct spells are spells that apply all the damage or healing at one time. That is, they have an instant duration. The amount of bonus damage or bonus healing depends on the [[cast time]] of the spell ''before any talents or abilities are applied to them''. Spells with a cast time of less than 1.5 sec or greater than 7.0 sec are treated as having a cast time of 1.5 sec and 7.0 sec, respectively.
 
 
Direct Damage spells:
 
 
C = Cast Time / 3.5
 
 
Direct Heal spells:
 
 
C = (Cast Time / 3.5) * 1.88
 
 
{| class="darktable" style="text-align:center;"
 
|-
 
! Cast time || Damage Coefficient || Healing Coefficient
 
|-
 
|| 1.5- sec || 42.86% || 80.57%
 
|-class="alt"
 
|| 2.0 sec || 57.14% || 107.43%
 
|-
 
|| ... || ... || ...
 
|-class="alt"
 
|| 6.5 sec || 185.71% || 349.14%
 
|-
 
|| 7.0+ sec || 200.00% || 376.00%
 
|}
 
 
Example calculation using Rank 11 (L80) of [[Fire Blast]] (Mage):
 
 
Cast Time = 0.0 (treated as 1.5)
 
 
C = 1.5 / 3.5 = 42.86%
 
 
Examples of such spells include: [[Healing Touch]] (Druid), [[Greater Heal]] (Priest), [[Shadow Bolt]] (Warlock)
 
 
Some exceptions of this rule are:
 
*[[Soul Fire]] (Warlock) - 115%
 
*[[Pyroblast]] direct damage: 115%, damage over time: 5%
 
 
=== Over time spells ===
 
Over time spells apply healing or damage over a period of time in [[tick]]s. The spell power coefficient depends on the duration of the over time effect.
 
 
Damage spells:
 
 
C = Duration / 15
 
 
Healing spells:
 
 
C = (Duration / 15) * 1.88
 
 
This coefficient applies to the entire duration of the spell. With a few exceptions, each tick receives an equal bonus. Therefore, the per-tick coefficient can be found by dividing the overall coefficient value by the number of ticks.
 
 
Prior to [[patch 2.0.1]], there was a 100% cap on over time spells longer than 15 seconds. This cap has since been removed. There is no minimum duration cap for over time spells.
 
 
{| class="darktable" style="text-align:center;"
 
|-
 
! Duration || Damage Coefficient || Healing Coefficient
 
|-
 
|| 3 sec || 20.00% || 37.60%
 
|-class="alt"
 
|| 6 sec || 40.00% || 75.20%
 
|-
 
|| ... || ... || ...
 
|-class="alt"
 
|| 15 sec || 100.00% || 188.00%
 
|-
 
|| 18 sec || 120% || 225.60%
 
|-class="alt"
 
|| 21 sec || 140% || 263.20%
 
|}
 
 
Example calculation using Rank 15 (L80) of [[Rejuvenation]] (Druid):
 
 
Duration = 15
 
Number of Ticks = 5
 
 
C<sub>Tot</sub> = 15 / 15 * 1.88 = 188.00%
 
C<sub>per-tick</sub> = C<sub>Tot</sub> / 5 = 37.60% per tick
 
 
Examples of these spells include: [[Rejuvenation]] (Druid), [[Renew]] (Priest)
 
 
Some exceptions to this rule are:
 
*[[Shadow Word: Pain]] (Priest) - 110%, increased beyond 140% with [[Improved Shadow Word: Pain]], which extends its duration to 24 sec.
 
*[[Curse of Agony]] (Warlock) - 120%.
 
*[[Curse of Doom]] (Warlock) - 200%.
 
 
=== Hybrid spells (Combined standard and over-time spells) ===
 
The bonus for spells that have both a direct and an over time component is divided between these components. Currently, the equations are unknown for hybrid healing spells. Several equations have been proposed, but none of them provide correct results for all (or most) hybrid spells. Because there are so few hybrid healing spells, it may be the case that their coefficients are not set by equations at all, but are chosen directly by the developers.
 
 
For hybrid damage spells, the equations are:
 
 
x = Duration / 15
 
y = Cast Time / 3.5
 
 
C<sub>DoT</sub> = x<sup>2</sup> / (x + y)
 
C<sub>DD</sub> = y<sup>2</sup> / (x + y)
 
 
C<sub>Tot</sub> = C<sub>DoT</sub> + C<sub>DD</sub>
 
 
Example calculation using the Rank 14 (L80) [[Moonfire]] (Druid) spell:
 
 
Duration = 12.0 sec
 
Cast Time = instant (treated as 1.5 sec)
 
 
x = 12.0 / 15.0 = 0.8000
 
y = 1.5 / 3.5 = ~0.4286
 
 
C<sub>Dot</sub> = 0.8000<sup>2</sup> / (0.8000 + 0.4286)
 
= 0.6400 / 1.2286
 
= 52.09%
 
 
C<sub>DD</sub> = 0.4286<sup>2</sup> / (0.8000 + 0.4286)
 
= 0.1837 / 1.2286
 
= 14.95%
 
 
So the DoT portion of Moonfire (4 ticks) has a coefficient of 52.09% (~13.02% per tick). The DD portion has a coefficient of 14.95%. The total coefficient is 52.09% + 14.95% = 67.04%. This agrees very closely with the empirical values of 52% and 15%, respectively.
 
 
Examples of these spells include: [[Moonfire]] (Druid), [[Immolate]] (Warlock)
 
 
Exceptions to this rule include
 
* [[Holy Fire]] (Priest) - 57.5% ([[Direct Damage|DD]]), 18.5% ([[Damage over Time|DoT]]) (As of patch 3.0)
 
* [[Regrowth]] (Druid) - ~30% ([[Direct Heal|DH]]), 70% ([[Heal over Time|HoT]])
 
 
=== Channeled spells ===
 
Channeled spells, like over time spells, have their benefit distributed over the entire duration of the spell. It is split evenly over each tick assuming that each tick causes the same amount of damage/healing. The duration of the spell cast time is used to calculate the total coefficient:
 
 
For damage spells:
 
 
C<sub>Tot</sub> = Duration / 3.5
 
 
For healing spells:
 
 
C<sub>Tot</sub> = (Duration / 3.5) * 1.88
 
 
For both:
 
 
C<sub>Tick</sub> = C<sub>Tot</sub> / Number of Ticks
 
 
Example calculation using Rank 13 (L79) of [[Arcane Missiles]] (Mage):
 
 
Duration = 5.0
 
Number of Ticks = 5
 
 
C<sub>Tot</sub> = 5 / 3.5 = 142.86%
 
C<sub>Tick</sub> = 28.57%
 
 
Examples of these spells include: [[Hurricane]] (Druid), [[Arcane Missiles]] (Mage), [[Hellfire]] (Warlock).
 
An exception to this rule is:
 
*[[Drain Soul]] (Warlock) - 214.3%.
 
 
=== Area of effect spells===
 
Area of Effect spells receive only 1/2 of the total bonus that they would if they were single-target spells. As with a direct spell, the cast time is used to calculate the coefficient. The 1.5 second minimum and 7.0 second maximum apply to area of effect spells.
 
 
Damage spells:
 
 
C = Cast Time / 7
 
 
Healing spells:
 
 
C = (Cast Time / 7) * 1.88
 
 
{| class="darktable" style="text-align:center;"
 
|-
 
! Cast time || Damage Coefficient || Healing Coefficient
 
|-
 
|| 1.5- sec || 21.43% || 40.29%
 
|-class="alt"
 
|| 2.0 sec || 28.57% || 53.71%
 
|-
 
|| ... || ... || ...
 
|-class="alt"
 
|| 6.5 sec || 92.861% || 174.57%
 
|-
 
|| 7.0+ sec || 100.00% || 188.00%
 
|}
 
 
Example calculation using Rank 7 (L80) of [[Circle of Healing]] (Priest)
 
 
Cast Time = instant (treated as 1.5)
 
 
C = (1.5 / 7) * 1.88 = 40.29%
 
 
Examples of these spells include:
 
[[Arcane Explosion]] (Mage), [[Prayer of Healing]] (Priest), [[Circle of Healing]] (Priest)
 
 
In the [[Burning Crusade]] and patch 2.0 there is a diminishing return against multiple targets. That is, as the number of targets your spells affect increases, the less damage you will deal to them. The numbers for this mechanic aren't yet known.
 
 
=== Paladin special attacks ===
 
Some paladin abilities work different ways. Here are some formulas tested in the [[Beta]] version of the [[Burning Crusade]].
 
 
[[Holy Shield]], [[Retribution Aura]] (paladin) reflects damage:
 
 
5% of +spell damage effect = +damage applied for each charge
 
 
Only paladin aura benefit from +dmg. A druid's [[Thorn]]s spell doesn't get its damage increased except by the [[Bramble]]s talent.
 
 
[[Seal of Righteousness]], which applies Holy damage on each melee attack:
 
 
[[One-handed]] [[weapons]]:
 
 
9.2% * [[Weapon Speed]] in seconds = Total
 
 
1.0 sec = 9.2%
 
2.2 sec = 20%
 
 
[[Two-handed]] weapons:
 
 
10.8% * [[Weapon Speed]] in seconds = Total
 
 
2.6 sec = 28%
 
3.7 sec = 40%
 
 
== Rules for applying spell damage and healing ==
 
#Calculate spell time using the base spell cast time '''before''' talents and gear. (The in-game tool tip will include those bonuses; refer to WoWWiki's [[spells]] section for base cast times for all spells.)
 
#Spells that take longer than 7.0 seconds to cast are treated as if their casting time was 7.0 seconds, and spells faster than 1.5 sec are treated as if their casting time was 1.5 seconds.
 
#Damage benefits are applied before any talents or buffs that may otherwise increase your spell damage.
 
 
== Penalty rules ==
 
=== Spells learned before level 20 ===
 
Many spells have multiple ranks. To avoid abuse of lower ranks to have a similar effect at a negligible mana cost, any spell learned below level 20 receives a large penalty. If such a spell has a shorter cast time than a higher rank, this is also taken in to account. This penalty can be calculated by subtracting 3.75% for each level lower than 20.
 
 
(20 - Level Spell is Learned) * .0375 = Penalty
 
 
=== Downranked spells ===
 
{{main|Downranking}}
 
 
Downranking, the act of purposefuly using a lower-rank cheaper spell, is no longer possible as of [[Patch 3.0]].
 
 
=== Spells with additional effects ===
 
Spells with additional effects, like a slowing effect, receive a penalty for each effect. Typically the penalty is 5% per additional effect, but can vary according to the developers' whims. For instance, here is the calculation for Rank 7 (L80) of [[Insect Swarm]] (Druid), which is an over time spell with a chance-to-hit debuff:
 
 
C = (12.0 / 15.0) * 0.95 = 76.00%
 
 
Examples of these spells include:
 
[[Blast Wave]] (Mage), [[Blizzard]] (Mage), [[Insect Swarm]] (Druid)
 
 
=== Spells that both damage and heal ===
 
Some spells, namely [[Drain#Life_Drains|Life Drains]], both damage the target and heal the caster. The bonus is split between the healing and damaging portion, roughly in proportion to the amount of healing and damage involved. That is, if a spell heals 4 points for every 1 point of damage, 1/5 of the spell's bonus will go to damage and roughly 4/5 will go to healing. Because bonus healing does not apply to these spells, the 1.88 multiplier is not used for the healing portion.
 
 
Thus Drain Life's bonus is applied 50%/50% to damage/healing, while Devouring Plague's bonus is split roughly 75%/25%. The exact equations are unknown at this time, but a reasonably close answer can be obtained by:
 
   
  +
==Additional notes==
C<sub>dmg</sub> = C<sub>Tot</sub> / (Damage Amount / [Damage Amount + Healing Amount])
 
  +
* Spell power does not apply to bandages or potions.
C<sub>heal</sub> = C<sub>Tot</sub> / (Healing Amount / [Damage Amount + Healing Amount])
 
   
  +
==History==
Examples of these spells include:
 
  +
Prior to [[patch 3.0.2]], the attribute known as '''spell damage''' would only increase the effects of damaging spells. Healing spells were only increased by the '''healing''' attribute. As of patch 3.0.2, '''spell power''' now affects both types of spells. Nevertheless, there are items which would increase your '''bonus healing''' independently of damage spells. Similarly, there are items which grant bonuses only to certain [[magic schools]] such as [[magic schools#Fire|Fire]] or [[magic schools#Nature|Nature]].
[[Devouring Plague]] (Priest), [[Holy Nova]] (Priest), [[Drain Life]] (Warlock)
 
   
  +
As of [[patch 4.0.1]] the ability to downrank has been removed. Spell power has also been removed from ''[[World of Warcraft: Wrath of the Lich King|Wrath of the Lich King]]'' gear (except weapons and trinkets) and gems, but casters now gain 1 spell power per point of intellect. Spell power on gems was changed to Intellect; for example, +23 spell power became +20 Intellect.
== Exceptions ==
 
*[[Corruption (spell)|Corruption]] (93%), [[Curse of Agony]] (120%), [[Curse of Doom]] (200%) and [[Shadow Word: Pain]] (110%) receive a reduced bonus.
 
*[[Drain Soul]] has its bonus reduced to half (214%).
 
*[[Fireball]] has a small damage over time component, but is not considered a hybrid spell, so it receives only the Direct Damage bonus to its direct damage component. Spell damage gear never increases the DoT on fireball.
 
*[[Holy Fire]] does not follow hybrid spell rules and receives 85.71% (DD) and 16.5% (DoT).
 
*[[Mind Flay]] does not follow channeling rules and uses 57% damage applied.
 
*[[Soul Fire]] is capped at 115%.
 
*[[Pyroblast]] deals 115% of +spell damage on impact and 20% of +spell damage to its DoT component.
 
   
  +
==Patch changes==
== Additional notes ==
 
  +
* {{Patch 7.0.3|note=
#+Healing does not apply to bandages or potions. Trinkets should no longer be affected.
 
  +
** Spell power has been removed from caster weapons and their bonus to [[Intellect]] greatly increased to compensate. Trinkets using spell power have had their bonus significantly increased.
#Shaman totems receive benefit from +Damage.
 
  +
** Spell power has been removed from the default [[character sheet]].}}
#Hunter Traps don't receive a benefit from increased spell damage.
 
  +
* {{Patch 4.0.1|note=Spell power has been removed from all armor (except [[Feathermoon Headdress]]).}}
  +
* {{Patch 3.0.2|note=All items and effects which grant bonuses to spell damage and spell healing are being consolidated into a single stat, Spell Power. This stat will appear with the same values found on items which grant "increased spell damage and healing" such as on typical Mage and Warlock itemization.
  +
** For classes which do not heal, they should see no change in the character sheet other than new tooltip wording.
  +
** Healing characters will see their bonus healing numbers on the character sheet decrease, however, all healing spells have been modified to receive more benefit from Spell Power than they received from bonus healing, with a net effect of no change to the amount healed by their spells. Some talents have had to be rebalanced to accommodate this change, but the amount healed will remain roughly the same. In addition, some talents will provide only healing spell power.}}
   
 
==See also==
 
==See also==
 
* [[Spell power coefficient]]
 
* [[Spell power coefficient]]
* [[Spell Damage Comparison]]
 
   
 
[[Category:Combat]]
 
[[Category:Combat]]
 
[[Category:Formulas and game mechanics]]
 
[[Category:Formulas and game mechanics]]
 
[[Category:Attributes]]
 
[[Category:Attributes]]
  +
[[Category:Game terms]]

Latest revision as of 20:47, 8 December 2019

"Spell Power" redirects here. For the former mage talent, see Spell arcane arcanetorrent [Spell Power].
"Spellpower" redirects here. For other uses, see Spellpower (disambiguation).

Spell power is an attribute that increases the effect of spells. Spell power increases the damage amount of damaging spells and the healing amount of healing spells.

Your bonus damage and bonus healing from spell power do not usually apply directly to a spell. Each spell (or each component of each spell) which causes damage or healing has a spell power coefficient which determines how much damage or healing the spell does.

Sources of spell power

Spell power is found primarily on trinkets as an on use effect, but can also be increased with potions.

Additional notes

  • Spell power does not apply to bandages or potions.

History

Prior to patch 3.0.2, the attribute known as spell damage would only increase the effects of damaging spells. Healing spells were only increased by the healing attribute. As of patch 3.0.2, spell power now affects both types of spells. Nevertheless, there are items which would increase your bonus healing independently of damage spells. Similarly, there are items which grant bonuses only to certain magic schools such as Fire or Nature.

As of patch 4.0.1 the ability to downrank has been removed. Spell power has also been removed from Wrath of the Lich King gear (except weapons and trinkets) and gems, but casters now gain 1 spell power per point of intellect. Spell power on gems was changed to Intellect; for example, +23 spell power became +20 Intellect.

Patch changes

  • Legion Patch 7.0.3 (2016-07-19):
    • Spell power has been removed from caster weapons and their bonus to Intellect greatly increased to compensate. Trinkets using spell power have had their bonus significantly increased.
    • Spell power has been removed from the default character sheet.
  • Cataclysm Patch 4.0.1 (2010-10-12): Spell power has been removed from all armor (except Inv helmet 04 [Feathermoon Headdress]).
  • Wrath-Logo-Small Patch 3.0.2 (2008-10-14): All items and effects which grant bonuses to spell damage and spell healing are being consolidated into a single stat, Spell Power. This stat will appear with the same values found on items which grant "increased spell damage and healing" such as on typical Mage and Warlock itemization.
    • For classes which do not heal, they should see no change in the character sheet other than new tooltip wording.
    • Healing characters will see their bonus healing numbers on the character sheet decrease, however, all healing spells have been modified to receive more benefit from Spell Power than they received from bonus healing, with a net effect of no change to the amount healed by their spells. Some talents have had to be rebalanced to accommodate this change, but the amount healed will remain roughly the same. In addition, some talents will provide only healing spell power.

See also