Mutation - Revision history

Hordes: update

2025-12-15T19:11:34Z

update

Riffraff at 06:19, 6 July 2025

2025-07-06T06:19:49Z

Hordes: /* Strategy */

2024-07-05T11:39:18Z

‎Strategy

Hordes: /* Strategy */

2024-07-05T11:38:10Z

‎Strategy

Patrick2011b: merge the Mutation resistance article here and fix resists per a discussion on Discord

2024-07-01T20:14:13Z

merge the Mutation resistance article here and fix resists per a discussion on Discord

Hordes: /* Gaining Mutations */ J's doesn't have a 20% for random mutation, so keep wiki terminology consistent

2024-01-07T22:46:06Z

‎Gaining Mutations: J's doesn't have a 20% for random mutation, so keep wiki terminology consistent

Hordes: /* Bad mutations */ rw Zin note again

2023-09-04T17:40:10Z

‎Bad mutations: rw Zin note again

Hordes: /* Bad mutations */

2023-09-04T17:38:42Z

‎Bad mutations

Hordes: /* Gaining Mutations */

2023-09-04T17:38:10Z

‎Gaining Mutations

Hordes: /* Random mutations */

2023-09-02T19:41:11Z

‎Random mutations

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-{{version031}}
+{{version033}}
 {{flavour|The Dungeon contains many sources of mutagenic radiation and magical contamination, which may cause your character to gain semi-permanent mutations if affected. You can use the 'A' command to view a list of any mutations that you have acquired. Individual mutations can be examined in further detail by pressing the letter they are labelled with.
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 ==Useful Info==
-Mutations induce various properties to your character, good or bad. [[Robust]] increases your max HP, [[Frail]] reduces it. Most species' gimmicks are defined by their starting mutations. Some mutations are transient (temporary), and are cured by gaining XP. Otherwise, mutations are permanent - they'll last until you have a way to remove mutations, usually [[potions of mutation]].
+Mutations induce various properties to your character, good or bad. [[Robust]] increases your max HP, [[Frail]] reduces it. Most species' gimmicks are defined by their mutations. Some mutations are transient (temporary), and are cured by gaining XP. Otherwise, mutations are permanent - they'll last until you have a way to remove mutations, usually [[potions of mutation]].
-[[Undead]] characters cannot mutate. In situations where a living character would gain a mutation, the undead suffer [[stat drain]], which can be cured by gaining XP.
+[[Undead]] characters cannot mutate. In situations where a living character would gain a mutation, the undead suffer max HP [[drain]], which can be cured by gaining XP.
 ===Innate===
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 *[[Zin]] provides a <code>piety / 1.6</code>% chance to block mutations. At 6* piety, this is 100% immunity (except for contamination).
 *[[Ashenzari]] provides immunity to mutations that would shatter a [[curse]]d item, like [[Horns]] with a cursed [[helmet]]. This applies 100% of the time to non-innate mutations, even from contamination.
-*Being [[undead]] ([[Ghoul]], [[Mummy]], [[Death Form]], but ''not'' [[Vampire]]) provides full, absolute immunity to mutation. Instead, you "rot" when mutating, causing [[stat drain]].
+*Being [[undead]] ([[Poltergeist]], [[Revenant]], [[Mummy]], [[Death Form]]) provides full, absolute immunity to mutation. Instead, you "rot" when mutating, causing [[drain]].
 When affected by "random" mutation (not "good" or "bad"), you have a <code>6.5% * non_innate_muts</code> chance to prevent it. Each time you resist this way, you have 33% chance to lose a mutation. [[Xom]] ignores this 67% of the time.
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 ==History==
 *Prior to [[0.29]], [[Ashenzari]] did not provide protection against mutations.
 *Prior to [[0.28]], [[Jiyva]] had the ability to Cure Bad Mutations. Its mutation gifting logic was also changed between versions.

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 *[[Demonspawn mutations]]
 *[[Jiyva mutations]]
 ==Useful Info==

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 ==Strategy==
 The mutation system in ''Crawl'' can be quite punishing:
-*Generally, the bad mutations are more bad than good mutations are good. [[Teleportitis]] randomly teleports you towards monsters, like you're hit by constant [[sourceless malevolence]]. [[No Unsafe Scrolls]]/[[No Unsafe Potions|Potions]] prevents using life-saving consumables. The best good mutations are the likes of resistances & extra HP, which come nowhere close to compensating the potentially lethal effects of the worst mutaitons.
+*Generally, the bad mutations are more bad than good mutations are good. [[Teleportitis]] randomly teleports you towards monsters, like you're hit by constant [[sourceless malevolence]]. [[No Unsafe Scrolls]]/[[No Unsafe Potions|Potions]] prevents using life-saving consumables. The best good mutations are the likes of resistances & extra HP, which come nowhere close to compensating the potentially lethal effects of the worst mutations.
 *Unless you worship [[Jiyva]], the only reliable way to remove mutations are [[potions of mutation]], which are finite and random. If you're using potions to remove a specific mutation, you can fail to remove that mutation, or introduce even worse ones in the process.

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 ==Strategy==
 The mutation system in ''Crawl'' can be quite punishing:
-*Generally, the bad mutations are more bad than good mutations are good. [[Teleportitis]] randomly teleports you towards monsters, like you're hit by constant [[sourceless malevolence]]. [[No Unsafe Scrolls]]/[[No Unsafe Potions|Potions]] prevents using life-saving consumables. Meanwhile, the best good mutations are the likes of resistances & extra HP.
+*Generally, the bad mutations are more bad than good mutations are good. [[Teleportitis]] randomly teleports you towards monsters, like you're hit by constant [[sourceless malevolence]]. [[No Unsafe Scrolls]]/[[No Unsafe Potions|Potions]] prevents using life-saving consumables. The best good mutations are the likes of resistances & extra HP, which come nowhere close to compensating the potentially lethal effects of the worst mutaitons.
 *Unless you worship [[Jiyva]], the only reliable way to remove mutations are [[potions of mutation]], which are finite and random. If you're using potions to remove a specific mutation, you can fail to remove that mutation, or introduce even worse ones in the process.

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-{{version030}}
+{{version031}}
 {{flavour|The Dungeon contains many sources of mutagenic radiation and magical contamination, which may cause your character to gain semi-permanent mutations if affected. You can use the 'A' command to view a list of any mutations that you have acquired. Individual mutations can be examined in further detail by pressing the letter they are labelled with.
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 *The [[Malmutate]] spell is most common source of malmutation, cast by a small variety of monsters ([[neqoxec]], [[shining eye]], [[cacodemon]], [[orb of fire]]).
 *[[Mnoleg]] can malmutate you on melee attacks (25% chance).
-*Any [[magic contamination]] over 5000 has a chance to malmutate you. Mutations induced this way will ignore mutation resistance 50% of the time (even bypassing [[Zin]]'s protection).<ref>{{source ref|0.30.1|timed-effects.cc|105}}<br>The 4th property, "force_mutation", has its value set to coinflip - so it's a 50% chance to ignore all resistances.</ref>
+*Any [[magic contamination]] over 5000 has a chance to malmutate you. Mutations induced this way will ignore mutation resistance 50% of the time (even bypassing [[Zin]]'s protection).<ref>{{source ref|0.31.0|timed-effects.cc|105}}<br>The 4th property, "force_mutation", has its value set to coinflip - so it's a 50% chance to ignore all resistances.</ref>
 Also, [[Jiyva]]'s [[divine retribution|wrath]] can inflict bad mutations 100% of the time (no chance for random mutation).
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 ==Mutation Resistance==
 Sources of mutation resistance stack multiplicatively:
-*The rMut item property (found only on [[Hat of the Alchemist]] and [[lajatang of Order]]) gives a 66% chance to block mutations. The item property does not stack with itself.
+*The rMut item property (found only on [[Hat of the Alchemist]] and [[lajatang of Order]]) gives a 66% chance to block bad mutations and a 50% chance to block transient mutations. The item property does not stack with itself.
-*The [[Good mutations#Mutation Resistance|Mutation Resistance]] mutation can block mutations based on its level. Level 1 gives a 66% chance to block incoming mutations. Level 2 also gives a 50% chance to block mutations from being removed. Level 3 gives a 100% chance to block incoming mutation and their removal (except from gods and contamination).
+*The [[Good mutations#Mutation Resistance|Mutation Resistance]] mutation can block mutations based on its level. Level 1 gives a 66% chance to block permanent mutations and a 50% chance to block transient mutations. Level 2 also gives a 50% chance to block mutations from being removed. Level 3 gives a 100% chance to block incoming mutations and their removal (except from gods and contamination).
 *[[Zin]] provides a <code>piety / 1.6</code>% chance to block mutations. At 6* piety, this is 100% immunity (except for contamination).
 *[[Ashenzari]] provides immunity to mutations that would shatter a [[curse]]d item, like [[Horns]] with a cursed [[helmet]]. This applies 100% of the time to non-innate mutations, even from contamination.
-*Being [[undead]] ([[Ghoul]], [[Mummy]], [[Lich Form]], but ''not'' [[Vampire]]) provides full, absolute immunity to mutation. Instead, you "rot" when mutating, causing [[stat drain]].
+*Being [[undead]] ([[Ghoul]], [[Mummy]], [[Death Form]], but ''not'' [[Vampire]]) provides full, absolute immunity to mutation. Instead, you "rot" when mutating, causing [[stat drain]].
 When affected by "random" mutation (not "good" or "bad"), you have a <code>6.5% * non_innate_muts</code> chance to prevent it. Each time you resist this way, you have 33% chance to lose a mutation. [[Xom]] ignores this 67% of the time.
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 ==History==
 *Prior to [[0.28]], [[Jiyva]] had the ability to Cure Bad Mutations. Its mutation gifting logic was also changed between versions.
-*Prior to [[0.21]], random mutations could be obtained by eating [[mutagenic corpse|mutagenic]] [[chunk]]s.
+*Prior to their removal in [[0.27]], [[Halfling]]s started with a level of mutation resistance.
 *Prior to [[0.20]], there were [[potions of cure mutation]] and [[potions of beneficial mutation]]; regular [[potions of mutation]] gave random mutations and didn't remove any. Also, Zin offered a 1-time ability at 6* to cure every mutation you had (instead of cleansing mutation potions).
 *Prior to [[0.20]], undead would sometimes rot instead of taking stat damage in place of mutations, and [[Mummies]] had a self-restoration ability.

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 ===Random mutations===
 *[[Xom]] can mutate you - depending on the action, it can be good, bad, or purely random.
-*[[Potions of mutation]] removes 2-3 mutations, then gives 1-3. Each added mutation has a 60% chance to be a good, and 40% chance to be random.
+*[[Potions of mutation]] removes 2-3 mutations, then gives 1-3. Each added mutation has a 60% chance to be good, and 40% chance to be random.
 ===Bad mutations===