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'''Willpower''' ('''Will''') is the ability to resist hostile enchantments such as [[slow]], [[confusion]], [[banishment]] to [[the Abyss]], and [[paralysis]].

The higher a being's Will, the less likely that it will be affected by an enchantment cast on it. Beings that are magical in some way (such as [[list of deep elves|elves]] or [[siren]]s), magic-users, and those that are not [[natural]] tend to have higher Will than other creatures.

Monster willpower is partly based on [[hit dice]], so monsters with high hit dice tend to be strong-willed. Most monsters with one hit die have a 50% chance to fail to resist enchantments outright, in addition to the normal saving throw. Finally, some monsters have unshakeable will and are outright immune to magical enchantments, such as most [[nonliving]] creatures.

==Resistible Enchantments==
Some of these effects can come from potions, weapon brands, clouds, or spells that are not considered enchantments.

<div style="column-count:3">
*[[Agony]]
*[[Banishment#Monster banishment|Banishment]]
*[[Brain Feed]]
*[[Cause Fear]]
*[[Confuse]]
*[[Confusing Touch]]
*[[Corona]]
*[[Dimension Anchor]]
*[[Discord]]
*[[Dispersal]] (confuse + teleport only)
*[[Enfeeble]] (daze + blindness only)
*[[Ensorcelled Hibernation]]
*[[Inner Flame]]
*[[Necrotise]]
*[[Mass Confusion]]
*[[Pain]]
*[[Paralyse]]
*[[Petrify]]
*[[Porkalator]]
*[[Scroll of fear]]
*[[Sentinel's Mark]]
*[[Sleep]] (but not the effects of [[Dream Dust]] from [[dream sheep]])
*[[Slow]]
*[[Strip Willpower]] (ignores Will 33% of the time)
*[[Teleport Other]]
*[[Virulence]]
*[[Wand of mindburst]]
*[[Wand of charming]]
*[[Wand of paralysis]]
*[[Wand of polymorph]]
</div>

===Notes===
*Many of these enchantments can be resisted via other means. For example, undead, nonliving, and plant monsters cannot be put to [[sleep]].
*[[Polymorph]] will not be resisted by ([[very ugly thing|very]]) [[ugly thing]]s, which will always change color. [[shapeshifter (monster)|shapeshifter]]s can only resist it if they are currently in the form of something with unshakeable will.
*Effects produced by the [[chaos]] brand don't check Will.

==Resisting enchantments==
Resisting an enchantment is dependent on the resisting creature's Will and the [[#Enchantment power|enchantment power]] (which is a function of the [[spell power]]) of the enchantment it is resisting. The formula is:<ref>{{source ref|0.30.0|actor.cc|121}}</ref>

{{crawlquote|If (1d100 + 1d101) is less than (102 + Will - enchantment_power), the enchantment is resisted.}}

This is sometimes referred to as a "[http://en.wiktionary.org/wiki/saving_throw saving throw]", after the die-based resistance system employed in ''Dungeons & Dragons''.

[[File:magic_resistance_saving_throw.png]]

If <code>(willpower) ≥ (enchantment power + 99)</code>, then the enchantment is always resisted. If <code>(enchantment power) ≥ (willpower + 100)</code>, then the enchantment always succeeds.

===Enchantment power===
When a player casts a spell or evokes a wand, the game uses enchantment power, which is based off [[spell power]] and the type of spell cast.

First, spellpower is modified by <code>spellpower * factor</code>, which is specific to a given spell. For example, [[Cause Fear]] and other "mass enchantments" have a factor of 3/2. The usual spell has a multiplier of 1. If your adjusted power > 35, it is then passed through a stepdown function, <code>35 * log2(1 + adj_pow/35)</code>.<ref>{{source ref|0.30.0|beam.cc|6806}}<br>Stepdown function can be found at {{source ref|0.30.0|stepdown.cc|14}}</ref>

The stepdown function means that, for every 35 enchantment power, the next 35 power requires twice as much spellpower to obtain. Since spellpower (for spells) goes through a [[Spell power#Step down|stepdown]] of its own, it becomes very hard to raise power at high levels. To compensate, many high-level spells, such as [[Agony]] and [[Enfeeble]], have large multipliers.

For monsters, enchantment power is either 1. a flat number, or 2. a number based on monster [[hit dice]].

After enchantment power is calculated, it is compared to the target's willpower (see above for more details).

==Resistance Descriptions==
Neither the player's nor monster's Will are ever given explicitly. A rough suggestion of how resistant they are can be seen by pressing the [[%]] key for the player, and e'''x'''amining a monster's description.

Pluses on these screens correspond to the Will level of the player or monster, as follows:
{|- class="prettytable"
!Pluses shown
!Player Will
!Monster Will
|-
| ..... || 0-39 || 0
|-
| +.... || 40-79 || 1-40
|-
| ++... || 80-119 || 41-80
|-
| +++.. || 120-159 || 81-120
|-
| ++++. || 160-199 || 121-160
|-
| +++++ || 200 || 161 or more
|}

Monsters always have a set amount of willpower, which is listed on the wiki's respective monster page. Players' willpower can be calculated with the formulas below.

As a practical matter, a player who has Will++++ should generally be able to resist the most dangerous enchanters in the game (such as [[deep elf demonologist]]s, [[lich]]es, and [[ancient lich]]es). More Will reduces the likelihood of these spells landing even further, but the gains become significantly less important beyond this point.

===Player Resistance===
A player's innate willpower is determined by the following equation:

Experience level × racial multiplier

Racial multipliers are as follows:
{|- class="prettytable"
!Will per XL
!Species
|-
| 7 || [[Spriggan]]
|-
| 6 || [[Felid]], Purple [[draconian]]
|-
| 5 || [[Meteoran]], [[Mummy]], [[Naga]], [[Vine stalker]]
|-
| 4 || [[Deep elf]], [[Demigod]], [[Formicid]], [[Ogre]], [[Vampire]]
|-
| 3 || All other species
|}

The following sources can add (or subtract) to your willpower:

* +40 for each source of Will+
** [[Ego|Armour of willpower]] (Will+)
** [[Ring of willpower]] (Will+)
** [[Good mutations#Magic Resistance|Strong-willed mutation]] (a level of Will+ per rank)
** [[Lichform]] (Will+)
** [[Artefact]]s (up to Will+++)
* +80 when using [[Trog]]'s Hand
* -80 with an [[guile|orb of guile]]

Willpower is capped at 200 at this stage. Then, willpower is modified by the following factors (in order):

*The total is then divided by two if you are under the '''Will/2''' status (from a [[scroll of vulnerability]], the [[:Category:Vuln flavour|attack]] of a [[phantasmal warrior]] or [[imperial myrmidon]], the [[Strip Willpower]] spell, or while in [[Tartarus]]).
*The [[robe of Folly]] sets your willpower to 0.
*[[Shadow Form]] gives infinite willpower.

==History==
*Prior to [[0.30]], willpower was not capped at 200 (Will+++++).
*Prior to [[0.26]], willpower was called '''magic resistance''' ('''MR''').
*Prior to [[0.13]], [[Blink Other]] was subject to magic resistance.

==References==
<references/>

[[Category:Game_mechanics]]

Willpower - Revision history

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