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'''Spirit Power''' is a [[stats|stat]] that increases the effectiveness of [[Ability|abilities]] and [[items]]. In addition to increasing [[Spirit Damage]], Spirit Power can also increase miscellaneous ability attributes that are not otherwise broadly covered by [[spirit|spirit stats]]. Spirit Power is generally useful on all heroes, but some will benefit much more than others due to better scaling coefficients.

== Spirit Power Scaling ==
[[File:Spirit scaling icon.png|alt=A box that says 79 damage in white text and a purple arrow and star indicating the damage is increased with spirit power.|thumb|The upward trending purple arrow and spirit star indicate this damage is increased by spirit power.]]
When an ability or item can be scaled by spirit power it will be indicated with a purple upward trending arrow and the spirit star icon. The effectiveness of spirit power on a given ability is based on its spirit power coefficient shown after the spirit scaling icon e.g. {{Ss|0.5}}. Using that spirit power coefficient, spirit damage can be represented with the formula:

<math>\mathit{Spirit Damage} = \mathit{Base Damage} + (\mathit{Spirit Power} * \mathit{Spirit Power Coefficient})</math>

For example, {{HeroIcon|Lash}}'s {{AbilityIcon|Flog}} ability deals 65 base damage and has a spirit power coefficient of {{ss|0.8}}. In a case where it was being buffed by 20 '''spirit power''', the calculation would be as follows:

<math>\mathit{Spirit Damage} = 65 + (20 * 0.8) = 81</math>

The same principle applies to items. For instance, [[Tesla Bullets]] deals 33 base damage with a coefficient of {{ss|0.19}}. If you have 76 spirit power, its damage becomes:

<math>\mathit{Spirit Damage} = 33 + (76 * 0.19) = 47.44</math>

In general this represents linear scaling, with the rate of increase being determined by the spirit power coefficient. In most cases, the spirit power coefficient can be obtained by hovering over the skill while pressing the <code>Extra Info</code> hotkey.

'''Note''': Obtaining exact calculations can be difficult because the spirit scaling values are ''rounded to the nearest tenth''. This can lead to inaccurate calculations when trying to apply the above formula. In general, it is possible to obtain good approximations of spirit power's affect on damage but exact calculations often require sandbox testing to obtain the un-rounded scaling values.

== Bonus Spirit Power ==
Flat bonus spirit power from all sources is added equally to the player's current spirit power (unlike [[Weapon Damage]] and [[Health]], in which the bonus values are calculated separately from the base values).

Sources of bonus percent (%) spirit power, such as {{ItemIcon|Boundless Spirit}}, stack multiplicatively with other bonus % sources, and apply to the player's current spirit power at all times.

== Spirit Scaling by Hero ==

{{#invoke:HeroDataArrays|heroSpiritTable}}

The following heroes have base stats that scale with Spirit Power.

{{#invoke:StatScaling|write_spirit_scaling_table}}

{{#invoke:LevelTables|write_power_increase_table|TechPower|title=Base Spirit Power based on Boons}}

=== Hidden Spirit Power Coefficients ===
For [[Items|items]], the spirit power coefficient is not currently shown, making it difficult to determine if and how effectively they will scale. In general, if an item deals spirit damage, that damage will scale with spirit power. Other properties of items such as inflicting [[Fire Rate]] slow or negative [[Bullet Resist]] do not currently scale with spirit power, even if they are produced by a spirit item.  

Because the spirit power coefficient on items is hidden it will have to be obtained via in-game testing when using spirit power. For example, equipping [[Tesla Bullets]] alongside [[Boundless Spirit]] (which adds 76 total spirit power) increases the spirit damage of Tesla Bullets from 30 to 40. Following the lookup formula:

<math>\mathit{Spirit Power Coefficient} = (\mathit{Spirit Damage} - \mathit{Base Damage}) / \mathit{Spirit Power}</math>

It is possible to calculate the coefficient as:

<math>\mathit{Spirit Power Coefficient} = (40 - 30) / 76 = 0.1315\ldots</math>

However, rounding errors make this value slightly inaccurate when applying it with other spirit power values. Until the spirit scaling is shown in the tooltip for items in a similar fashion to abilities, this approximation technique is the only way to gauge the effectiveness of scaling spirit power for items.

== Sources ==
All [[Spirit|spirit items]] provide Spirit Power based on the player's total investment in the category.

{{#invoke:ItemInvestmentTable|write_spirit}}

The following items explicitly grant increased Spirit Power:
{{Item stat table|Spirit Power}}
* {{ItemIcon|Golden Goose Egg}} grants random [[Permanent Buffs]], including Spirit Power.

=== Map spawns ===
* [[Golden Statue|Golden Statues]] can provide a permanent Spirit Power buff.
* [[Powerup]] runes can provide a temporary Casting buff that provides +'''15''' to +'''65''' Spirit Power for 160 seconds (scaling with game time from 5 to 40 minutes).

{{notelist}}

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[[Category:Damage Calculation]]