Deep one (dNetHack) - Revision history

Umbire the Phantom: update mon inv

2026-05-28T11:44:23Z

update mon inv

Umbire the Phantom: not poisonous in *dnh

2026-02-05T14:37:23Z

not poisonous in *dnh

Umbire the Phantom: snipping - assumption was that hydra/dagon were growth stages rather than tied specifically to deepest ones

2026-02-05T12:57:10Z

snipping - assumption was that hydra/dagon were growth stages rather than tied specifically to deepest ones

Umbire the Phantom: detailing

2026-02-04T23:10:12Z

detailing

Umbire the Phantom: ref

2026-02-04T21:47:40Z

ref

Umbire the Phantom: /* Origin */ tweak

2026-02-04T21:44:26Z

‎Origin: tweak

Umbire the Phantom: pothole

2026-02-04T21:42:57Z

pothole

Umbire the Phantom: and another big one

2026-02-04T21:42:23Z

and another big one

Umbire the Phantom: big big pass for inventory and generation stuff alongside a few other bits

2026-02-04T19:20:13Z

big big pass for inventory and generation stuff alongside a few other bits

Umbire the Phantom: AAAAAGH

2025-04-24T11:51:38Z

AAAAAGH

@@ Line 53: / Line 53: @@
 ** One of the following weapon sets with an equal probability of each:
 *** a thoroughly [[rusty]] [[Assault rifle (dNetHack)|assault rifle]], 3 stacks of [[Bullet (dNetHack)|bullets]] and a thoroughly eroded [[knife]]
-*** a thoroughly rusty [[Pistol (dNetHack)|pistol]], a stack of bullets and a thoroughly eroded [[scimitar]]
+*** a thoroughly rusty [[Pistol (dNetHack)|pistol]], a stack of bullets and a thoroughly eroded [[Cutlass (dNetHack)|cutlass]]
 *** a thoroughly rusty [[Heavy machine gun (dNetHack)|heavy machine gun]], 4 stacks of bullets and a thoroughly eroded knife
 *** a thoroughly rusty [[Submachine gun (dNetHack)|submachine gun]], 3 stacks of bullets and a thoroughly eroded [[short sword]]
@@ Line 60: / Line 60: @@
 ** A {{frac|6}} chance of explosive weapons: a stack of [[Frag grenade (dNetHack)|frag grenades]] ({{frac|2|3}} chance), a stack of [[Gas grenade (dNetHack)|gas grenades]] ({{frac|6}} chance), or a [[Rocket launcher (dNetHack)|rocket launcher]] and a stack of [[Rocket (dNetHack)|rockets]] ({{frac|6}} chance)
 * Deep ones generated on R'lyeh&ndash;the lowest floor of the Lost Cities and the [[Neutral Quest (dNetHack)|Neutral Quest]]&ndash;are created with the following: an uncursed rustproof +3 [[trident]]; an uncursed rustproof +3 [[ranseur]]; a stack of 3 thoroughly eroded and uncursed +3 [[javelin]]s; a set of cursed +3 [[archaic plate mail]]; an uncursed +3 [[oilskin cloak]]; a thoroughly eroded and uncursed +3 [[orcish shield]]; and two randomly-selected [[potion]]s from a potion of {{! of|acid|confusion|blindness|sleeping|or=1|paralysis}}, with acid having twice as much chance of being selected as the other potions.
-* Deep ones generated elsewhere in the dungeon are created with a set of body armor that has an equal probability of being a jacket, a set of leather armor, or a set of [[chain mail]] that will be very rusty if the chain mail is made of a rust-prone [[Object materials (dNetHack)|material]]. They will also be given a number of weapons equal to {{sfrac|4d2|3}} (rounded down) that are chosen from the following set with equal probability: a [[two-handed sword]], a scimitar, a trident, a short sword, a [[dagger]], or a [[spear]]&mdash;each of the chosen weapons will be thoroughly rusty if they are generated with a rust-prone material.
+* Deep ones generated elsewhere in the dungeon are created with a set of body armor that has an equal probability of being a jacket, a set of leather armor, or a set of [[chain mail]] that will be very rusty if the chain mail is made of a rust-prone [[Object materials (dNetHack)|material]]. They will also be given a number of weapons equal to {{sfrac|4d2|3}} (rounded down, i.e. 1 or 2) that are chosen from the following set with equal probability: a [[two-handed sword]], a scimitar, a trident, a short sword, a [[dagger]], or a [[spear]]&mdash;each of the chosen weapons will be thoroughly rusty if they are generated with a rust-prone material.
 ==Strategy==

@@ Line 26: / Line 26: @@
 Deep ones have a weapon attack, an offhand weapon attack, a kick attack, and a [[passive attack]] that triggers on death and raises the current maximum HP of every other deep one-related monster that is on the current [[dungeon level]], increasing their [[monster level]] if necessary&mdash;this applies to the deep one's growth stages, as well as [[Father Dagon (dNetHack)|Father Dagon]] and [[Mother Hydra (dNetHack)|Mother Hydra]], and deep ones themselves gain +2 HP when this passive from any deep one-related monster triggers. Deep ones have basic prowess in martial combat, and possess [[sleep resistance]] and [[cold resistance]].
-Deep ones are [[poisonous]] to consume, and [[eating]] a deep one [[corpse]] or [[tin]]&ndash;or [[quaffing]] its [[Potion of blood (dNetHack)|blood]]&ndash;grants [[Temporary intrinsic|temporary sleep resistance]] for a duration of 4,000 turns before [[physical size]] modifiers.
+[[Eating]] a deep one [[corpse]] or [[tin]]&ndash;or [[quaffing]] its [[Potion of blood (dNetHack)|blood]]&ndash;grants [[Temporary intrinsic|temporary sleep resistance]] for a duration of 4,000 turns before [[physical size]] modifiers.
 Deep ones can be [[Ward (dNetHack)|warded]] by an [[User:Chris/dNetHack/Elder Sign|Elder Sign]] at any level of reinforcement.

@@ Line 65: / Line 65: @@
 While deep ones themselves are not especially remarkable on an individual basis, they frequently generate in large groups, and their "shared soul" passive means that each deep one killed on the current level will gain HP and potentially become stronger or even grow up: there is no feedback for a deep one growing up this way, so be ''especially'' careful when dealing with squads of hostile deep ones and their stronger relatives! This also applies to peaceful or even tamed deep ones, so taking advantage of this is a great way to beef up a pet deep one, but also increases the risk of it turning traitor and becoming hostile.
-Deep ones represent a significant hazard on the [[Plane of Water]], specifically for heroes that attempt to preemptively [[genocide]] [[sea monster]]s ''before'' entering the [[magic portal]] to the level itself: none of the deep ones or their kin can be genocided, and are highly likely to replace the now-missing sea monsters during initial level generation. This makes such preemptive genocides a [[bad idea]] and all but ensures that the hero will be swarmed by fairly tanky and high-difficulty monsters which become even stronger if any of them are killed, and enough HP gains from the "shared soul" passive may even cause one of them to become Father Dagon or Mother Hydra if they have not already appeared&mdash;this effect will be more pronounced if the hero entered R'lyeh earlier in that run. Combined with the Plane of Water and its moving air bubbles, the outcome is likely to be disastrous for most [[ascension run]]s even if Hydra and Dagon are not the biggest threats present (e.g. contending with [[Uiscerre Eladrin]] and [[charybdisone]]s that cannot be genocided), and [[iron]]-hating heroes such as [[Elf (starting race)#dNetHack|elves]], [[Drow (starting race)#dNetHack|drow]] and [[Yuki-onna (starting race)|yuki-onna]] are especially vulnerable.
+Deep ones represent a significant hazard on the [[Plane of Water]], specifically for heroes that attempt to preemptively [[genocide]] [[sea monster]]s ''before'' entering the [[magic portal]] to the level itself: none of the deep ones or their kin can be genocided, and are highly likely to replace the now-missing sea monsters during initial level generation. This makes such preemptive genocides a [[bad idea]] and all but ensures that the hero will be swarmed by fairly tanky and high-difficulty monsters which become even stronger if any of them are killed&mdash;this effect will be more pronounced if the hero entered R'lyeh earlier in that run. Combined with the Plane of Water and its moving air bubbles, the outcome is likely to be disastrous for most [[ascension run]]s even if the deep ones are not the biggest threats present (e.g. contending with [[Uiscerre Eladrin]] and [[charybdisone]]s that cannot be genocided), and [[iron]]-hating heroes such as [[Elf (starting race)#dNetHack|elves]], [[Drow (starting race)#dNetHack|drow]] and [[Yuki-onna (starting race)|yuki-onna]] are especially vulnerable.
 ==History==

@@ Line 12: / Line 12: @@
   |frequency=2
   |genocidable=No
-  |attacks=Weapon 1d6 [[Physical damage|physical]], [[Twoweapon#dNetHack|offhand weapon]] 1d6 physical, [[kick]] 2d4 physical, [[passive]] 0d0 shared soul
+  |attacks=[[Weapon]] 1d6 [[Physical damage|physical]], [[Twoweapon#dNetHack|offhand weapon]] 1d6 physical, [[kick]] 2d4 physical, [[passive]] 0d0 shared soul
   |weight=1450
   |nutr=400
@@ Line 24: / Line 24: @@
 A '''deep one''', {{monsym|deep one}}, is a type of monster that appears in [[dNetHack]], [[notdNetHack]] and [[notnotdNetHack]]. The deep one is a type of medium-sized, [[omnivorous]] [[Humanoid (monster class)|humanoid]] that is [[aquatic]], [[demihuman]] and mutated from [[Human (monster attribute)|humans]]: they are [[strong]], [[amphibious]] and capable of [[swimming]], have [[infravision]], can be seen via infravision, will seek out [[gold]], [[gem]]s, [[magical item]]s, and other objects to pick up, and can [[follow]] a [[hero]] to other levels if they are adjacent. Seeing a deep one can increase the hero's [[insight]], and being attacked by a deep one or any of its growth stages can increase the hero's deep one-specific [[impurity]] with a {{frac|''n''}} chance (where ''n'' is the current impurity level)&mdash;reaching impurity levels of 1, 4 and 15 for this counter will also increase the hero's overall impurity. [[Tame]] deep ones may turn [[traitor]].
-Deep ones have a weapon attack, an offhand weapon attack, a kick attack, and a [[passive attack]] that triggers on death and raises the current maximum HP of every other deep one-related monster that is on the current [[dungeon level]], increasing their [[monster level]] if necessary&mdash;this applies to the deep one's growth stages, [[Father Dagon (dNetHack)|Father Dagon]] and [[Mother Hydra (dNetHack)|Mother Hydra]], and deep ones themselves gain +2 HP when this passive from any deep one-related monster triggers. Deep ones have basic prowess in martial combat, and possess [[sleep resistance]] and [[cold resistance]].
+Deep ones have a weapon attack, an offhand weapon attack, a kick attack, and a [[passive attack]] that triggers on death and raises the current maximum HP of every other deep one-related monster that is on the current [[dungeon level]], increasing their [[monster level]] if necessary&mdash;this applies to the deep one's growth stages, as well as [[Father Dagon (dNetHack)|Father Dagon]] and [[Mother Hydra (dNetHack)|Mother Hydra]], and deep ones themselves gain +2 HP when this passive from any deep one-related monster triggers. Deep ones have basic prowess in martial combat, and possess [[sleep resistance]] and [[cold resistance]].
 Deep ones are [[poisonous]] to consume, and [[eating]] a deep one [[corpse]] or [[tin]]&ndash;or [[quaffing]] its [[Potion of blood (dNetHack)|blood]]&ndash;grants [[Temporary intrinsic|temporary sleep resistance]] for a duration of 4,000 turns before [[physical size]] modifiers.
@@ Line 43: / Line 43: @@
 Deep ones may appear in the court of a randomly-generated [[Throne room#dNetHack|throne room]] ruled by a deepest one. They may also appear as [[Prisoner (dNetHack)|prisoners]] in random throne rooms.
-Deep ones are among the various [[H.P. Lovecraft]]-inspired r'lyehians that can appear in the [[Anachrononaut quest]] and [[Android quest]], making up {{frac|3|28}} of the monsters randomly generated on those quests. Five deep ones are also generated on the locate level of the Anachrononaut quest during level creation.
+Deep ones are among the various [[H.P. Lovecraft]]-inspired r'lyehians that can appear in the [[Anachrononaut quest]] and [[Android quest]], making up {{frac|3|28}}<!--triple-check math--> of the monsters randomly generated on those quests. Five deep ones are also generated on the locate level of the Anachrononaut quest during level creation.
 ===Monster starting inventory===
@@ Line 59: / Line 59: @@
 *** a thoroughly rusty [[Sniper rifle (dNetHack)|sniper rifle]], 3 stacks of bullets and a thoroughly eroded short sword
 ** A {{frac|6}} chance of explosive weapons: a stack of [[Frag grenade (dNetHack)|frag grenades]] ({{frac|2|3}} chance), a stack of [[Gas grenade (dNetHack)|gas grenades]] ({{frac|6}} chance), or a [[Rocket launcher (dNetHack)|rocket launcher]] and a stack of [[Rocket (dNetHack)|rockets]] ({{frac|6}} chance)
-* Deep ones generated on R'lyeh&ndash;the lowest floor of the Lost Cities and the [[Neutral Quest (dNetHack)|Neutral Quest]]&ndash;are created with the following: an uncursed rustproof +3 [[trident]], an uncursed rustproof +3 [[ranseur]], a stack of 3 thoroughly eroded and uncursed +3 [[javelin]]s, a set of cursed +3 [[archaic plate mail]], an uncursed +3 [[oilskin cloak]], a thoroughly eroded and uncursed +3 [[orcish shield]], and two randomly-chosen offensive [[potion]]s.
+* Deep ones generated on R'lyeh&ndash;the lowest floor of the Lost Cities and the [[Neutral Quest (dNetHack)|Neutral Quest]]&ndash;are created with the following: an uncursed rustproof +3 [[trident]]; an uncursed rustproof +3 [[ranseur]]; a stack of 3 thoroughly eroded and uncursed +3 [[javelin]]s; a set of cursed +3 [[archaic plate mail]]; an uncursed +3 [[oilskin cloak]]; a thoroughly eroded and uncursed +3 [[orcish shield]]; and two randomly-selected [[potion]]s from a potion of {{! of|acid|confusion|blindness|sleeping|or=1|paralysis}}, with acid having twice as much chance of being selected as the other potions.
 * Deep ones generated elsewhere in the dungeon are created with a set of body armor that has an equal probability of being a jacket, a set of leather armor, or a set of [[chain mail]] that will be very rusty if the chain mail is made of a rust-prone [[Object materials (dNetHack)|material]]. They will also be given a number of weapons equal to {{sfrac|4d2|3}} (rounded down) that are chosen from the following set with equal probability: a [[two-handed sword]], a scimitar, a trident, a short sword, a [[dagger]], or a [[spear]]&mdash;each of the chosen weapons will be thoroughly rusty if they are generated with a rust-prone material.

@@ Line 19: / Line 19: @@
   |resistances conveyed=[[sleep resistance]] (+4,000)
   |attributes={{attributes|A deep one|swim=1|amphibious=1|humanoid=1|omnivore=1|human=1|hostile=1|stalk=1|strong=1|greedy=1|jewels=1|collect=1|magic=1|infravision=1|infravisible=1|nohell=1|lgroup=1|traitor=1}}
-  |reference=
+  |reference=[https://github.com/Chris-plus-alphanumericgibberish/dNAO/blob/compat-3.25.0/src/monst.c#L1028 dNAO 3.25.0 - src/monst.c, line 1028]
 }}
 {{for|the monster in SLASH'EM and its related variants|deep one (SLASH'EM)}}

@@ Line 74: / Line 74: @@
 The Deep Ones are creatures in the [[Cthulhu Mythos]] of [[H. P. Lovecraft]]. The beings first appeared in Lovecraft's 1931 novella ''[[Wikipedia:The Shadow over Innsmouth|The Shadow over Innsmouth]]'', but were already hinted at in the 1917 short story [[Wikipedia:Dagon (short story)|"Dagon"]]. The Deep Ones are a race of intelligent ocean-dwelling creatures, approximately human-shaped but with a fishy appearance, and the males would regularly mate with human women against their will, creating societies of hybrids along the coast.
-Despite being primarily marine creatures, Deep Ones can survive on land for extended periods of time and possess biological immortality, never dying except by accident or violence. The Deep One portrayed in Dagon is of a vastly larger size than the roughly human-scaled beings seen in Innsmouth, and the wider Cthulhu Mythos implies that Deep Ones continuously grow throughout their lives, hence their size changing when they grow up in SLASH'EM and other variants.
+Despite being primarily marine creatures, Deep Ones can survive on land for extended periods of time and possess biological immortality, never dying except by accident or violence. The Deep One portrayed in Dagon is of a vastly larger size than the roughly human-scaled beings seen in Innsmouth, and the wider Cthulhu Mythos implies that Deep Ones continuously grow throughout their lives, hence their size changing when they grow up in dNetHack and other variants.
 ==Encyclopedia entry==

@@ Line 68: / Line 68: @@
 ==History==
-The deep one first appears in the [[Lethe Patch]] against [[NetHack 3.3.1]].
+The deep one first appears in the [[Lethe patch]] against [[NetHack 3.3.1]].
 ==Origin==

@@ Line 12: / Line 12: @@
   |frequency=2
   |genocidable=No
-  |attacks=Weapon 1d6 [[Physical damage|physical]], [[Twoweapon#dNetHack|offhand weapon]] 1d6 physical, Kick 2d4 physical, [[Passive]] 0d0 shared soul
+  |attacks=Weapon 1d6 [[Physical damage|physical]], [[Twoweapon#dNetHack|offhand weapon]] 1d6 physical, [[kick]] 2d4 physical, [[passive]] 0d0 shared soul
   |weight=1450
   |nutr=400
   |size=medium
   |resistances=[[cold resistance]], [[sleep resistance]]
-  |resistances conveyed=[[sleep resistance]] (4000 turns)
+  |resistances conveyed=[[sleep resistance]] (+4,000)
   |attributes={{attributes|A deep one|swim=1|amphibious=1|humanoid=1|omnivore=1|human=1|hostile=1|stalk=1|strong=1|greedy=1|jewels=1|collect=1|magic=1|infravision=1|infravisible=1|nohell=1|lgroup=1|traitor=1}}
   |reference=
 }}
 {{for|the monster in SLASH'EM and its related variants|deep one (SLASH'EM)}}
-A '''deep one''', {{monsym|deep one}}, is a type of monster that appears in [[dNetHack]], [[notdNetHack]] and [[notnotdNetHack]]. Deep ones are a type of [[amphibious]] and omnivorous [[Humanoid (monster class)|humanoid]] that are [[Human (monster attribute)|human]] and medium in size: they are [[strong]], capable of [[swimming]], have [[infravision]], can be seen via infravision, will seek out [[gold]], [[gem]]s, [[magical item]]s, and other objects to pick up, and can [[follow]] a [[hero]] to other levels if they are adjacent. [[Tame]] deep ones may turn [[traitor]].
+A '''deep one''', {{monsym|deep one}}, is a type of monster that appears in [[dNetHack]], [[notdNetHack]] and [[notnotdNetHack]]. Deep ones are a type of [[amphibious]] and omnivorous [[Humanoid (monster class)|humanoid]] that have [[Human (monster attribute)|human]] ancestry and are medium in size: they are [[strong]], capable of [[swimming]], have [[infravision]], can be seen via infravision, will seek out [[gold]], [[gem]]s, [[magical item]]s, and other objects to pick up, and can [[follow]] a [[hero]] to other levels if they are adjacent. [[Tame]] deep ones may turn [[traitor]].
-Deep ones have a weapon attack, an offhand weapon attack, a kick attack, and a [[passive attack]] that triggers on death and raises the current maximum HP of every other deep one-related monster currently on the level, raising their [[monster level]] if necessary&mdash;this applies to the deep one's growth stages, [[Father Dagon]], and [[Mother Hydra]], and deep ones themselves gain +2 HP when this passive from any deep one-related monster triggers. Deep ones possess [[sleep resistance]] and [[cold resistance]].
+Deep ones have a weapon attack, an offhand weapon attack, a kick attack, and a [[passive attack]] that triggers on death and raises the current maximum HP of every other deep one-related monster that is currently on the level, increasing their [[monster level]] if necessary&mdash;this applies to the deep one's growth stages, [[Father Dagon]], and [[Mother Hydra]], and deep ones themselves gain +2 HP when this passive from any deep one-related monster triggers. Deep ones possess [[sleep resistance]] and [[cold resistance]].
-Deep ones are [[poisonous]] to consume, and [[eating]] a deep one [[corpse]] or [[tin]] or [[quaff]]ing its [[Potion of blood (dNetHack)|blood]] grants [[Temporary intrinsic|temporary sleep resistance]] for a duration of 4000 turns before [[physical size]] modifiers.
+Deep ones are [[poisonous]] to consume, and [[eating]] a deep one [[corpse]] or [[tin]] or [[quaff]]ing its [[Potion of blood (dNetHack)|blood]] grants [[Temporary intrinsic|temporary sleep resistance]] for a duration of 4,000 turns before [[physical size]] modifiers.
 ==Generation==
-Randomly-generated deep ones are always created hostile, and can appear in large [[group]]s. They will not be randomly generated in [[Gehennom (dNetHack)|Gehennom]]. A deep one can [[grow up]] into a [[Deeper one (dNetHack)|deeper one]].
+Randomly-generated deep ones are always created hostile, and can appear in large [[group]]s. They will not be randomly generated in [[Gehennom (dNetHack)|Gehennom]], and are not a valid genocide target. A deep one can [[grow up]] into a [[Deeper one (dNetHack)|deeper one]].
 A deeper one that is randomly generated will always have a group of {{rn1|10|3}} deep ones accompanying them, and a [[Deepest one (dNetHack)|deepest one]] that is randomly generated will always have a large group of {{rn1|10|10}} deep ones accompanying them.
 {{frac|5}} of the monsters randomly generated on the Sunken City map of [[The Sea (dNetHack)|the Sea]] will be deep ones.
 ==Origin==