Difference between revisions of "Acid"

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'''Acid''' is a [[damage type]] most commonly dealt by [[List of jellies|jellies]] and [[Acid dragon|acidic]] [[Yellow draconian|dragonkind]], which can be resisted with corrosion resistance. Most types of acid damage can apply a temporary corrosion status, which lowers your AC and slaying.
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'''Acid''' is a [[damage type]] most commonly dealt by [[List of jellies|jellies]] and [[Acid dragon|acidic]] [[Yellow draconian|dragonkind]], which can be resisted with corrosion resistance. Most types of acid damage can apply a temporary corrosion status, which lowers your [[AC]] and [[slaying]].
  
 
==Sources of Acid==
 
==Sources of Acid==
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Acidic damage can come from several sources:
 
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===Acidic Melee Attacks===
 
===Acidic Melee Attacks===
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The following monsters have acidic melee attacks, which deal acid damage and may apply corrosion:
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The following monsters have acidic melee attacks, which may apply corrosion:
  
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{{monsterlink|Jelly}}
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*{{monsterlink|Jelly}}
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*{{monsterlink|Acid blob}}
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*{{monsterlink|Dissolution}}
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*{{monsterlink|The royal jelly}}
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*{{monsterlink|Caustic shrike}}
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*{{Brown|u}} [[File:Ugly thing1.png]] '''Brown [[ugly thing]]s and [[very ugly thing]]s'''
  
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{{monsterlink|Acid blob}}
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Acidic melee attacks may cause an "acid splash" (the message "the acid burns!"). Players receive 4d3 extra damage, and monsters only receive 2d4 extra damage.
  
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{{monsterlink|Dissolution}}
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===Acidic Flesh===
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Some monsters have acidic flesh and will cause acid splashes when attacked with a melee weapon, like the extra "splash" from the melee attack (4d3 vs players):
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{{monsterlink|The royal jelly}}
 
  
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{{monsterlink|Caustic shrike}}
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*{{monsterlink|Jelly}}
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*{{monsterlink|Acid blob}}
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*{{monsterlink|Dissolution}}
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*{{monsterlink|The royal jelly}}
  
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===Acid Spit===
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===Spit Acid===
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The following monsters can spit acid as a ranged attack, which bypasses AC and may incur corrosion:
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The following monsters can [[Spit Acid]] as a ranged attack, dealing 3d14 acid damage that bypasses AC and may incur corrosion:
  
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{{monsterlink|Oklob sapling}}: 3d7 (3d3)
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*{{monsterlink|Acid blob}}
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*{{monsterlink|Acid dragon}}
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*{{monsterlink|Oklob plant}}
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*{{monsterlink|Oklob sapling}}
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*{{monsterlink|Yellow draconian}}
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*{{monsterlink|Tiamat}}
  
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{{monsterlink|Oklob plant}}: 3d7 (3d6)
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Player yellow [[draconian]]s may use the [[Acid Splash]] ability, which is like Spit Acid but can hit surrounding enemies. Neither Spit Acid nor Acid Splash ability have the "acid splash" of melee attacks.
  
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{{monsterlink|Acid dragon}}:
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===Corrosive Bolt===
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The spell [[Corrosive Bolt]] deals significant acid damage and may inflict corrosion. Several monsters may cast it, as well as any creature that has picked up a [[wand of acid]].
  
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{{monsterlink|Acid blob}}: 3d7
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{{monsters with spell|Corrosive Bolt}}
  
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{{monsterlink|Yellow draconian}}: 3d7
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===Acidic Fog===
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Acidic fog is a type of [[cloud]] that deals acid damage to and corrodes anything unfortunate enough to be standing in it. It can only be produced by a high-powered [[condenser vane]].
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===Acidic Flesh===
 
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Some monsters have acidic flesh and will deal acid damage when attacked at close range:
 
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{{monsterlink|Jelly}}
 
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{{monsterlink|Acid blob}}
 
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{{monsterlink|Dissolution}}
 
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{{monsterlink|The royal jelly}}
 
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===Slime Walls===
 
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Standing next to the [[wall]]s of [[the Slime Pits]] will cause players and non-jelly monsters to take damage, although it does not cause the corrosion status.
 
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Worshipers of [[Jiyva]] are unaffected by slime walls.  
 
  
 
==Corrosion Resistance==
 
==Corrosion Resistance==
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Corrosion resistance reduces damage taken from acid and reduces the chance of being further corroded.
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Corrosion resistance reduces damage taken from acid and reduces the chance of being further corroded. Also, it gives immunity to [[Cloud#Acidic_fog|clouds of acidic fog]].
  
 
The sources of Corrosion resistance are:
 
The sources of Corrosion resistance are:
 
*being a yellow [[draconian]]
 
*being a yellow [[draconian]]
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*[[Ring of resist corrosion]]
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*[[cloak of preservation]]
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*[[Acid dragon scales]]
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*[[ring of resist corrosion]]
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*[[acid dragon scales]]
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*[[artefact]]s with rCorr
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*[[potion of resistance]]
 
*[[Tiamat]]'s [[dragonskin cloak]] (50% chance per attack)
 
*[[Tiamat]]'s [[dragonskin cloak]] (50% chance per attack)
 
*Having the [[Good_mutations#Yellow_Scales|yellow scales]] mutation at level 3
 
*Having the [[Good_mutations#Yellow_Scales|yellow scales]] mutation at level 3
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===Damage Reduction===
 
===Damage Reduction===
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Players with corrosion resistance take 50% damage from acid. All monsters with any degree of acid resistance are completely immune to acid damage.
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Players with corrosion resistance take 50% damage from acid. All monsters with any degree of acid resistance are completely immune to acid damage.
  
 
==Corrosion==
 
==Corrosion==
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Corrosion is a temporary [[status effect]] which gives a stackable -4 to [[slaying]] and [[AC]] for as long as it lasts. Corrosion will be repaired after enough turns have passed. It can also be removed with [[Potion of cancellation]] or [[Draconian#Purple|Purple Draconian's]] breath aimed at yourself.
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Corrosion is a temporary [[status effect]].
  
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In addition to taking acid damage, players may also suffer corrosion from these sources:
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On players, it gives a stackable -4 to damage roll and [[AC]] for its duration. Players with corrosion resistance will resist 50% of corrosion attempts. All corrosion will be repaired after enough time has passed. It can be immediately removed with a [[potion of cancellation]] or other dispelling effects ([[Yara's Violent Unravelling]], [[Quicksilver Bolt]], or your own [[Draconian#Purple|purple draconian]] breath).
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*The [[Entropic Weave]] spell of {{monsterlink|Entropy weaver}}s
 
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*Taking damage when wearing an [[randart|artefact]] with the '''*Corrode''' property.
 
  
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Monsters that have been corroded simply get a temporary -8 to their AC.
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In addition to acid damage, players may also suffer corrosion from these sources:
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*Being hit by enemies with [[:Category:Corrode flavour|corrosive attacks]] (like the {{monsterlink|Rust devil}}).
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*The [[Entropic Weave]] spell of {{LightCyan|B}} [[File:Entropy weaver.png]] '''[[Entropy weaver]]s''' or {{LightGreen|6}} [[File:Demonspawn corrupter.png]] '''[[Demonspawn corrupter]]s'''
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*Taking damage while wearing an [[randart|artefact]] with the '''*Corrode''' property (3% chance per '''*Corrode''').
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*Being adjacent to [[Wall#Slime Covered Rock|slime covered rock]]. (Corrosion will cease as soon as you move away from the wall.)
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Monsters that have been corroded get a temporary -8 to their AC. This does ''not'' stack -- additional corrosion merely increases the duration.
  
 
==History==
 
==History==
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Prior to [[0.15]], corrosion instead caused permanent damage to weapons and armor, reducing their enchantment values, possibly into the negatives. Also, [[potions of resistance]] did not grant rAcid or rCorr.
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{{CBA|0.32|corrosion will be reworked. Each stack will reduce AC and Slay by 1, most sources of corrosion will apply 4x stacks to compensate. Having corrosion resistance will halve the number of stacks applied to the player instead of a coinflip chance to prevent the status entirely.}}
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There were previously three tiers of acid resistance, each one further reducing acid damage; now there is only one level which is merged with corrosion resistance.
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*Prior to [[0.30]], slime-covered walls in [[the Slime Pits]] would inflict acid damage.
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*Prior to [[0.28]], Spit Acid, Acid Splash, and Corrosive Bolt caused additional "acid splashes" (extra 4d5 v. the player, 2d4 v. monsters). Their base damage was lower to compensate.
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[[Category:Damage types]]
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*Prior to [[0.15]], corrosion instead caused permanent damage to weapons and armour, reducing their enchantment values, possibly into the negatives. Also, [[potions of resistance]] did not grant rAcid or rCorr.
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*There were previously three tiers of acid resistance, each one further reducing acid damage; now there is only one level which is merged with corrosion resistance.
 +
*In previous versions, acid splashes did more damage if you were wearing less armour (2 dice plus an additional die for each empty armour slot); cloaks provided a 50% chance per empty slot of negating this extra damage, and the damage was reduced by having the [[Shaggy Fur|fur mutation]].

Latest revision as of 19:13, 27 March 2024

Version 0.31: This article is up to date for the latest stable release of Dungeon Crawl Stone Soup.

Acid is a damage type most commonly dealt by jellies and acidic dragonkind, which can be resisted with corrosion resistance. Most types of acid damage can apply a temporary corrosion status, which lowers your AC and slaying.

Sources of Acid

Acidic Melee Attacks

The following monsters have acidic melee attacks, which may apply corrosion:

Acidic melee attacks may cause an "acid splash" (the message "the acid burns!"). Players receive 4d3 extra damage, and monsters only receive 2d4 extra damage.

Acidic Flesh

Some monsters have acidic flesh and will cause acid splashes when attacked with a melee weapon, like the extra "splash" from the melee attack (4d3 vs players):

Spit Acid

The following monsters can Spit Acid as a ranged attack, dealing 3d14 acid damage that bypasses AC and may incur corrosion:

Player yellow draconians may use the Acid Splash ability, which is like Spit Acid but can hit surrounding enemies. Neither Spit Acid nor Acid Splash ability have the "acid splash" of melee attacks.

Corrosive Bolt

The spell Corrosive Bolt deals significant acid damage and may inflict corrosion. Several monsters may cast it, as well as any creature that has picked up a wand of acid.

The following enemies cast Corrosive Bolt:

The following enemies may be able to cast Corrosive Bolt, depending on their spell set:

Acidic Fog

Acidic fog is a type of cloud that deals acid damage to and corrodes anything unfortunate enough to be standing in it. It can only be produced by a high-powered condenser vane.

Corrosion Resistance

Corrosion resistance reduces damage taken from acid and reduces the chance of being further corroded. Also, it gives immunity to clouds of acidic fog.

The sources of Corrosion resistance are:

Damage Reduction

Players with corrosion resistance take 50% damage from acid. All monsters with any degree of acid resistance are completely immune to acid damage.

Corrosion

Corrosion is a temporary status effect.

On players, it gives a stackable -4 to damage roll and AC for its duration. Players with corrosion resistance will resist 50% of corrosion attempts. All corrosion will be repaired after enough time has passed. It can be immediately removed with a potion of cancellation or other dispelling effects (Yara's Violent Unravelling, Quicksilver Bolt, or your own purple draconian breath).

In addition to acid damage, players may also suffer corrosion from these sources:

Monsters that have been corroded get a temporary -8 to their AC. This does not stack -- additional corrosion merely increases the duration.

History

  • In 0.32, corrosion will be reworked. Each stack will reduce AC and Slay by 1, most sources of corrosion will apply 4x stacks to compensate. Having corrosion resistance will halve the number of stacks applied to the player instead of a coinflip chance to prevent the status entirely.
  • Prior to 0.30, slime-covered walls in the Slime Pits would inflict acid damage.
  • Prior to 0.28, Spit Acid, Acid Splash, and Corrosive Bolt caused additional "acid splashes" (extra 4d5 v. the player, 2d4 v. monsters). Their base damage was lower to compensate.
  • Prior to 0.15, corrosion instead caused permanent damage to weapons and armour, reducing their enchantment values, possibly into the negatives. Also, potions of resistance did not grant rAcid or rCorr.
  • There were previously three tiers of acid resistance, each one further reducing acid damage; now there is only one level which is merged with corrosion resistance.
  • In previous versions, acid splashes did more damage if you were wearing less armour (2 dice plus an additional die for each empty armour slot); cloaks provided a 50% chance per empty slot of negating this extra damage, and the damage was reduced by having the fur mutation.
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