Poison

2015-03-23T21:41:09Z

RepHenryClay: /* Poison Resistance */

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'''Poison''' is one of the most common elemental forces you will encounter as you explore the [[Dungeon]]. Both players and monsters can take advantage of poison through spells or specially [[brand]]ed weapons, though it is most commonly encountered in the form of the stings and bites of poisonous monsters.

==Poison Damage==
Generally, poison damage occurs over time whenever something suffers from the Poison condition (indicated by the word Pois on your status). The duration of this condition and the amount of damage it deals per turn is somewhat randomized, but depends heavily upon the severity of the poison. This is displayed by the color of the word "Pois" in your status: yellow lettering means mild poison, pink is medium, and red is severe. Be cautious in areas with poisonous monsters, as the poison condition can be stacked; getting hit multiple times from a poisonous enemy can result in severe poisoning if you're careless.

While even low-level characters can usually survive mild poisoning, severe cases can deal tremendous amounts of damage over time. In any case, it is almost always best to rest and avoid combat until the poison has run its course, perhaps on a cleared floor to avoid wandering monsters.

Alternatively, some spells and abilities deal poison damage directly, causing an immediate drop in [[HP]]. These attacks usually also inflict the poison condition, making them exceedingly dangerous for characters without appropriate defenses.

Try to avoid being both [[sick]] and poisoned, as your natural [[regeneration rate|regeneration]] contributes much to your chances of surviving poison. This is also why poison is more dangerous to low-level characters than high-level ones -- at low levels, your regeneration rate may not be fast enough to keep up with poison.

==Poison Sources==
It is relatively easy for characters to gain access to sources of poison damage. Characters who specialize in weapons that strike quickly can benefit from [[venom]]-branded weapons, which inflict the poison condition on top of their normal physical damage. Ranged weapon-users can instead use [[poisoned]] missiles, which function identically. Both of these effects are stackable for more lethal results. The [[staff of poison]] and [[staff of Olgreb]] have a poisonous melee attack that is dependent on your skill in [[Poison Magic]] and that can potentially affect poison-resistant creatures.

The Poison Magic school is also available to [[venom mage]]s or any character with [[Spellcasting]] capabilities and an appropriate [[book]]. This school is devoted almost entirely to dealing poison damage, though it also contains some spells for inflicting [[confusion]] and a handy poison remedy for yourself.

[[Naga]]s have an innate [[Spit Poison]] ability which inflicts significant physical and poison damage.

Characters can also be poisoned in a number of unorthodox ways. Characters [[quaff]]ing unidentified [[potions]] may accidentally drink a [[potion of poison]] or [[potion of strong poison]]. [[Needle trap]]s and [[pressure plate]]s may inflict the condition, as will being affected by [[miasma]]. Especially suicidal characters may also acquire it by eating poisonous [[chunk]]s, though there is really no reason to do this.

Worshipers of [[the Shining One]] should avoid inflicting poison, as he is offended by such dishonorable tactics.

==Poison Types==
There are four types of poison: regular, medium, strong, and nasty.

*Regular poison has a 25% chance of giving the defender one level of poison on a successful attack (5% if the attack does less than 2 points of damage).
*Medium poison has a 33% chance of poisoning the defender (7% if the attack did less than 2 points of damage) for 1d3 levels of poison.
*Strong poison has a 33% chance of poisoning the defender (7% if the attack did less than 2 points of damage) for 2d5+1 levels of poison. If the defender is [[natural]] or a [[plants|plant]] and has 1 or 2 levels of poison resistance, it will take 1d3 levels of poison.
*Nasty poison always imparts 2 levels of poison to any creatures that are not immune or resistant.

Monsters receive half the above levels of poison, rounded down (but never less than 1).

==Poison Resistance==
In [[0.10]], poison resistance was changed to have multiple levels, although this is not reflected on the player's resistances overview. Any level of resistance confers immunity to [[Poisonous Cloud|Poisonous]] and [[Mephitic Cloud|Mephitic]] Cloud, and gives players a 90% chance of shrugging off each level of poison at the time that it is applied. Three levels of poison resistance makes one impervious to the "poisoned" [[condition]], although poison damage is only partly reduced ([[#Damage Reduction|see below]]) and many poison attacks have a physical component as well.

Monsters with three levels of poison resistance are immune to all sources of poison damage and the poison condition. Monsters with one or two levels of resistance can potentially still become poisoned by strong or nasty poison.

As an added benefit, poison resistance allows you to eat poisoned chunks.

You can acquire poison resistance from a number of sources:
*[[Good mutations#Poison Resistance|Poison Resistance]] [[mutation]]
*The third rank of the [[Good mutations#Slimy Green Scales|Slimy Green Scales]]
*[[Swamp dragon hide]] and [[swamp dragon armour]]
*[[Gold dragon hide]] and [[gold dragon armour]]
*Armour of [[ego|poison resistance]]
*[[Staff of poison]] or [[staff of Olgreb]]
*[[Ring of poison resistance]]
*[[Tiamat]]'s [[dragonskin cloak]] (50% chance per attack)
*[[Randart]]s
*[[Potion of resistance]]
*[[Ice Form]] or [[Dragon Form]]
*Being a [[naga]], green [[draconian]], or thirsty [[vampire]] (these [[species]] all have poison resistance)
*Being undead ([[mummy]], [[ghoul]], bloodless [[vampire]], or through [[Necromutation]]) or artificial ([[gargoyle]] or through [[Statue Form]]) renders you completely immune to poison.
*[[Zin]]'s Vitalisation ability prevents the [[status effect]], but you can't eat poisoned chunks and you still take full damage from sources of direct poison damage like [[Poison Arrow]] or [[Poisonous Cloud]]. However, it does grant resistance to [[Venom Bolt]] and [[Sting]].
*[[Deep dwarf]] damage shaving affects damage from poison, and may effectively negate all but the most severe poison conditions
*[[Healing]] yourself through other means will ''not'' cure the condition, but may give you the HP you need to wait it out.

===Poison Vulnerability===
Some monsters (particularly insects and spiders – and you, in [[Spider Form]]) are vulnerable to poison, taking twice as much damage from poison attacks, and doubling the number of poison levels received.

===Damage Reduction===

*[[Sting]] and [[Venom Bolt]]
{| class="wikitable"
! Resistance Level !! Damage Taken (Player) !! Damage Taken (Monster)
|-
| -1 || 100% || 150%
|-
| 0 || 100% || 100%
|-
| 1 || 100% or 50%<ref>100% if it inflicts a dose of poison despite poison resistance. 50% otherwise.</ref> || 50%
|-
| 2 || - || 20%
|-
| 3 || 50% || 0%
|}

*[[Poison Arrow]]
{| class="wikitable"
! Resistance Level !! Damage Taken (Player) !! Damage Taken (Monster)
|-
| -1 || 135% || 135%
|-
| 0 || 100% || 100%
|-
| 1 || 65% || 65%
|-
| 2 || - || 44%
|-
| 3 || 44% || 30%
|}

==Curing Poison==
Characters that lack poison resistance can still avoid the worst of its effects by curing the condition before it runs its course. The following options are available:
*[[Quaff]]ing a [[potion of curing]].
*[[Cure Poison]]
*[[Elyvilon]]'s Purification ability

==Poisoned Condition==
Poison attacks frequently result in a monster or player having the "poisoned" [[condition]]. While poisoned, a creature will take an amount of damage proportional to the degree to which it is poisoned. Each dose of poison "stacks" with previous ones, up to a maximum of 40 levels of poison for players. Different damage formulas are used for players and monsters:

===Player Formula===
*Each turn, you have a poison_level in 5 chance of taking damage from poison; at 5+ levels of poison, this is automatic. The damage is as follows:
**If you have more than 10 levels of poisoning, if 1d(poison_level) is greater than 8, you will take 1d10+4 damage.
**If you have 5-10 levels of poisoning, there is a 50% chance you will take 2-3 points of damage.
**Otherwise, you will take 1 point of damage.
*You also have a 1 in 8 chance of losing one level of poison each turn (1 in 3 if you have been reduced to 1 hp).
*If your [[Cheibriados]] piety is at * or above (slowed/strengthened metabolism), there is a 50% chance you will take no damage – but this will bypass the check to lose a level of poison as well. This effectively halves the damage per turn of poison but doubles its duration (which also gives you more time to regenerate health).

===Monster Formula===
poisonval = number of stacked poison statuses on the monster
*If poisonval >= 4, base damage is 1. Otherwise, base damage is 0.
*There is a 50% chance of an additional 1d(poisonval+1) damage.
*If the monster is vulnerable to poison, there is an additional 2d(poisonval) - 1 damage.
Source: [http://git.develz.org/?p=crawl.git;a=blob;f=crawl-ref/source/mon-ench.cc#l1365 mon-ench.cc]

{| class="wikitable" style="text-align: center;"
|+ Poison damage taken each turn (monster only)
|-
! width="80pt" |# stacked poison !! Average (normal) !! Average (vulnerable) !! Min (normal) !! Min (vulnerable) !! Max (normal) !! Max (vulnerable)
|-
| 1 || 0.75|| 1.75|| 0|| 1|| 2|| 3
|-
| 2 || 1|| 3|| 0|| 1|| 3|| 6
|-
| 3 || 1.25|| 4.25|| 0|| 1|| 4|| 9
|-
| 4 || 2.5|| 6.5|| 1|| 2|| 6|| 13
|-
| 5 || 2.75|| 7.75|| 1|| 2|| 7|| 16
|-
| 6 || 3|| 9|| 1|| 2|| 8|| 19
|-
| N || N/4 + 1.5|| N * 5/4 + 1.5|| 1|| 2|| N + 2|| N * 3 + 1
|}

==History==
Prior to [[0.13]], [[Statue Form]] only granted one level of poison resistance.

==Notes==
<references/>

==See Also==
[[:Category:Poison resistance|List of poison resistant monsters]]

[[:Category:Poison vulnerability|List of poison vulnerable monsters]]

[[Category:Status effects]]
[[Category:Threats]]
[[Category:Crystal Ball Articles]]

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Poison