Difference between revisions of "Wizardry"

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'''Wizardry''' refers to items and effects that directly reduce your chance of failure when casting spells. These are provided by:
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'''Wizardry''' refers to items and effects that directly reduce your chance of failure when casting spells. These are provided by [[ring of wizardry|rings]] and the [[demonspawn mutation]] [[Big Brain]].
  
* [[Ring of wizardry|Rings of wizardry]] (+3)
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A single source of wizardry decreases [[Spell Success#Modifiers|raw spell failure]] by ×75%, two sources by ×66.6%, and three by ×50%. This is a multiplicative factor, applied after calculating spell failure from skills, though failure is modified by a [[Spell_Success#Final Step|further modifier]].
* [[Staff of wizardry|Staves of wizardry]] (+4)
 
* Quaffing a [[potion of brilliance]] provides a temporary wizardry bonus (+6)
 
  
In addition, certain sources provide a wizardry-like reduction of failure rate (by 1/3) that stacks with wizardry:
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Generally, the actual decrease to failure rate will be ''larger'' than the raw decrease.<ref>This is true when your (post-wizardry failure rate) < 50%. The smaller the failure, the smaller the % multiplier (keep in mind that it ''is'' a multiplier).</ref> For example, wizardry x1 will bring failure rates from 80% -> 45% (×56%), 50% -> 22% (×44%), or 15% -> 6% (×37.5%).
* [[Vehumet]] provides a bonus to destructive spells for sufficiently [[piety|pious]] worshipers not under [[penance]]
 
* Potions of brilliance
 
  
All of these sources stack but very weakly; the first 3 points of wizardry are about as good as the next 9. In no case can failure rate be reduced by better than half using wizardry. Notice that a potion of brilliance will reach the one-half cap by itself.
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In addition, [[Vehumet]] applies two sources of wizardry (×66.6%) to destructive spells. This bonus stacks with wizardry from other sources.<ref>{{source ref|0.30.0|spl-cast.cc|335}}</ref>
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==History==
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*Big Brain was introduced in [[0.27]].
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*Prior to [[0.26]], [[staff of wizardry|staves of wizardry]] existed, which gave a rank of wizardry.
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*Prior to [[0.25]], [[potion of brilliance]] provided a temporary wizardry bonus.
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*Prior to [[0.14]], a staff of wizardry granted a better wizardry bonus than a [[ring of wizardry]].
  
 
==See also==
 
==See also==
*[[Spell success#Wizardry, Vehumet, and other factors|Spell success]] for details on how wizardry affects failure rate
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*[[Spell success#Modifiers|Spell success]] for details on how wizardry affects failure rate.
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==References==
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<references />
  
 
[[Category:Magic]]
 
[[Category:Magic]]

Revision as of 18:51, 24 July 2023

Version 0.30: This article may not be up to date for the latest stable release of Crawl.

Wizardry refers to items and effects that directly reduce your chance of failure when casting spells. These are provided by rings and the demonspawn mutation Big Brain.

A single source of wizardry decreases raw spell failure by ×75%, two sources by ×66.6%, and three by ×50%. This is a multiplicative factor, applied after calculating spell failure from skills, though failure is modified by a further modifier.

Generally, the actual decrease to failure rate will be larger than the raw decrease.[1] For example, wizardry x1 will bring failure rates from 80% -> 45% (×56%), 50% -> 22% (×44%), or 15% -> 6% (×37.5%).

In addition, Vehumet applies two sources of wizardry (×66.6%) to destructive spells. This bonus stacks with wizardry from other sources.[2]

History

See also

References

  1. This is true when your (post-wizardry failure rate) < 50%. The smaller the failure, the smaller the % multiplier (keep in mind that it is a multiplier).
  2. spl-cast.cc:335 (0.30.0)