Yeenoghu - Revision history

Noisytoot: His confusion attack is not a gaze attack, it is a weapon attack

2025-11-06T18:48:30Z

His confusion attack is not a gaze attack, it is a weapon attack

← Older revision		Revision as of 18:48, 6 November 2025
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	Like other demon princes, Yeenoghu is covetous and will teleport next to you to deliver melee attacks and fire magic missiles. When at low health, he will teleport to the upstair tile to regenerate, and will escape up them if approached too closely; the usual strategies for covetous monsters apply, including obstructing the upstair or else luring him to a floor with a blocked upstair. As he is able to summon [[Demogorgon]] directly, dispatching him quickly is advised.		Like other demon princes, Yeenoghu is covetous and will teleport next to you to deliver melee attacks and fire magic missiles. When at low health, he will teleport to the upstair tile to regenerate, and will escape up them if approached too closely; the usual strategies for covetous monsters apply, including obstructing the upstair or else luring him to a floor with a blocked upstair. As he is able to summon [[Demogorgon]] directly, dispatching him quickly is advised.

	Yeenoghu respects [[Elbereth]], but Elbereth does not work in [[Gehennom]], where Yeenoghu is most likely to be encountered—even if you encounter him outside Gehennom (e.g. via water demon or a non-Gehennom [[bones]]), you may be better off escaping and avoiding the floor entirely if somehow possible unless your character is sufficiently prepared. If you can take the fight to him, then remember that you cannot attack him while on an Elbereth, as doing so will cause it to fade; on top of this, Yeenoghu's confusing ~~gaze~~ can complicate your attempts to engrave, and his tendency to teleport after you at the first opportunity usually means you will have to lure him to a pre-engraved Elbereth elsewhere.		Yeenoghu respects [[Elbereth]], but Elbereth does not work in [[Gehennom]], where Yeenoghu is most likely to be encountered—even if you encounter him outside Gehennom (e.g. via water demon or a non-Gehennom [[bones]]), you may be better off escaping and avoiding the floor entirely if somehow possible unless your character is sufficiently prepared. If you can take the fight to him, then remember that you cannot attack him while on an Elbereth, as doing so will cause it to fade; on top of this, Yeenoghu's confusing weapon attack can complicate your attempts to engrave, and his tendency to teleport after you at the first opportunity usually means you will have to lure him to a pre-engraved Elbereth elsewhere.

	==History==		==History==

Umbire the Phantom: copyedit pass

2025-07-29T06:40:36Z

copyedit pass

← Older revision		Revision as of 06:40, 29 July 2025
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	\|frequency=Unique		\|frequency=Unique
	\|genocidable=No		\|genocidable=No
	\|attacks=Weapon 3d6, weapon 2d8 [[confusion]], claw 1d6 [[paralyze]], [[Monster spell\|spellcasting]] 2d6 [[magic missile]]		\|attacks=[[Weapon]] 3d6 [[Physical damage\|physical]], weapon 2d8 [[confusion]], [[Claw attack\|claw]] 1d6 [[paralyze]], [[Monster spell\|spellcasting]] 2d6 [[Magic missile (monster spell)\|magic missile]]
	\|weight=900		\|weight=900
	\|nutr=500		\|nutr=500
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	'''Yeenoghu''', {{monsym\|yeenoghu}}, is a [[unique]] [[monster]] that appears in ''[[NetHack]]''. He is a [[demon lord]] that is [[covetous]] and capable of warping, and desires the [[Amulet of Yendor]]. Yeenoghu has [[infravision]] and can be seen via infravision, and can also [[fly]], [[see invisible]], and pick up items that he comes across.		'''Yeenoghu''', {{monsym\|yeenoghu}}, is a [[unique]] [[monster]] that appears in ''[[NetHack]]''. He is a [[demon lord]] that is [[covetous]] and capable of warping, and desires the [[Amulet of Yendor]]. Yeenoghu has [[infravision]] and can be seen via infravision, and can also [[fly]], [[see invisible]], and pick up items that he comes across.

	Yeenoghu has a weapon attack, a second weapon attack that inflicts confusion, a claw attack that can [[paralyze]] the target, and the ability to ~~fire~~ [[magic missile]]s. Yeenoghu possesses [[poison resistance]] and [[fire resistance]], [[magic resistance]] from his magic missile attack, and [[drain resistance]] and [[death resistance]] like all [[~~M2_DEMON\|demons~~]].		Yeenoghu has a weapon attack, a second weapon attack that inflicts [[confusion]], a [[claw attack]] that can [[paralyze]] the target, and the ability to cast the [[Magic missile (monster spell)\|magic missile]] [[monster spell]]. Yeenoghu possesses [[poison resistance]] and [[fire resistance]], [[magic resistance]] from his magic missile attack, and [[drain resistance]] and [[death resistance]] like all [[major demon]]s.

	Yeenoghu is [[poisonous]] to eat, which primarily comes up if he is [[digested]] by another monster.		Yeenoghu is [[poisonous]] to eat, which primarily comes up if he is [[digested]] by another monster.

	==Generation==		==Generation==
	Yeenoghu is not a valid form ~~for [[polymorph]]~~.		Yeenoghu is not a valid polymorph form or genocide target.

	Yeenoghu is one of two demon lords alongside [[Juiblex]] that can be summoned by performing same-race [[sacrifice]], and will be peaceful for a chaotic [[hero]] and hostile otherwise. Yeenoghu also has a chance of being summoned by [[demon gating]], or via the [[summon nasties]] [[monster spell]] being cast either in Gehennom or by the [[Wizard of Yendor]].		Yeenoghu is one of two demon lords alongside [[Juiblex]] that can be summoned by performing same-race [[sacrifice]], and will be peaceful for a chaotic [[hero]] and hostile otherwise. Yeenoghu also has a chance of being summoned by [[demon gating]], or via the [[summon nasties]] monster spell being cast either in Gehennom or by the [[Wizard of Yendor]].

	Yeenoghu is [[~~Monster starting inventory\|~~always generated with]] a [[flail]].		Yeenoghu is [[always generated with]] a [[flail]].

	==Strategy==		==Strategy==
	Yeenoghu can deal out tremendous physical damage if you lack [[free action]] and [[MC3]]; his melee attacks can also gate in other [[major ~~demon]]s~~, and he can zap you with [[magic ~~missile]]s~~ as well, ~~meaning~~ he ~~is himself immune to them on~~ top of his high [[monster ~~magic resistance~~]]. However, Yeenoghu is not generally a problem if you are prepared for him.		Yeenoghu can deal out tremendous physical damage if you lack [[free action]] and [[MC3]]; his melee attacks can also gate in other major demons, and he can zap you with magic missiles as well. Defensively, he has magic resistance top of his high [[Magic resistance (monster)\|MR score]] of 80. However, Yeenoghu is not generally a problem if you are prepared for him.

	Like other demon princes, Yeenoghu is [[covetous]] and will teleport next to you to deliver melee attacks and fire magic missiles. When at low health, he will teleport to the upstair tile to regenerate, and will escape up them if approached too closely; the usual strategies for covetous monsters apply, including obstructing the upstair or else luring him to a floor with a blocked upstair. As he is able to summon [[Demogorgon]] directly, dispatching him quickly is advised.		Like other demon princes, Yeenoghu is covetous and will teleport next to you to deliver melee attacks and fire magic missiles. When at low health, he will teleport to the upstair tile to regenerate, and will escape up them if approached too closely; the usual strategies for covetous monsters apply, including obstructing the upstair or else luring him to a floor with a blocked upstair. As he is able to summon [[Demogorgon]] directly, dispatching him quickly is advised.

	Yeenoghu respects [[Elbereth]]~~; however~~, Elbereth does not work in [[Gehennom]], where Yeenoghu is most likely to be encountered~~. Even~~ if you encounter him outside Gehennom (e.g. via water demon or a non-Gehennom [[bones]]), you may be better off escaping and avoiding the floor entirely if somehow possible unless your character is sufficiently prepared. If you can take the fight to him, then remember that you cannot attack him while on an Elbereth, ~~either~~; on top of this, Yeenoghu's confusing gaze ~~will~~ complicate your attempts to engrave, and his tendency to teleport after you at the first opportunity usually means you will have to lure him to a pre-engraved Elbereth elsewhere.		Yeenoghu respects [[Elbereth]], but Elbereth does not work in [[Gehennom]], where Yeenoghu is most likely to be encountered—even if you encounter him outside Gehennom (e.g. via water demon or a non-Gehennom [[bones]]), you may be better off escaping and avoiding the floor entirely if somehow possible unless your character is sufficiently prepared. If you can take the fight to him, then remember that you cannot attack him while on an Elbereth, as doing so will cause it to fade; on top of this, Yeenoghu's confusing gaze can complicate your attempts to engrave, and his tendency to teleport after you at the first opportunity usually means you will have to lure him to a pre-engraved Elbereth elsewhere.

	==History==		==History==
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	==Variants==		==Variants==
	===UnNetHack===		===UnNetHack===
	In [[UnNetHack]], Yeenoghu ~~no longer respects~~ Elbereth.		In [[UnNetHack]], Yeenoghu does not respect Elbereth.

	===EvilHack===		===EvilHack===
	In [[EvilHack]], Yeenoghu ~~now~~ generates with an [[artifact]] [[triple-headed flail]] called [[Butcher]], and his magic missile attack is buffed from 2d6 to 6d6.		In [[EvilHack]], Yeenoghu generates with an [[artifact]] [[triple-headed flail]] called [[Butcher]], and his magic missile attack is buffed from 2d6 to 6d6.

	==Encyclopedia entry==		==Encyclopedia entry==

Umbire the Phantom: /* "A ludicrous bug" */ word choice again

2024-10-09T07:09:08Z

"A ludicrous bug": word choice again

← Older revision		Revision as of 07:09, 9 October 2024
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	==="A ludicrous bug"===		==="A ludicrous bug"===
	Yeenoghu is ~~the~~ subject of one of the longer-running [[software bug]]s in the history of ''NetHack''.		Yeenoghu is a subject of one of the longer-running [[software bug]]s in the history of ''NetHack''.

	The [[Riders]] are introduced in [[NetHack 3.1.0]], with the code that handles their special attacks placed right after the code for Yeenoghu's confusion-inducing weapon attack - this code was inserted carelessly without a break in the code to separate its [[damage type]] case from [[Death (monster)\|Death]]'s deadly touch, resulting in Yeenoghu using his weapon attack and then:{{refsrc\|mhitu.c\|1214\|nethack=3.1.0\|comment=<tt>AD_CONF</tt> case\|name="confusion"}}		The [[Riders]] are introduced in [[NetHack 3.1.0]], with the code that handles their special attacks placed right after the code for Yeenoghu's confusion-inducing weapon attack - this code was inserted carelessly without a break in the code to separate its [[damage type]] case from [[Death (monster)\|Death]]'s deadly touch, resulting in Yeenoghu using his weapon attack and then:{{refsrc\|mhitu.c\|1214\|nethack=3.1.0\|comment=<tt>AD_CONF</tt> case\|name="confusion"}}

Umbire the Phantom: /* "A ludicrous bug" */ word choice

2024-10-09T07:08:44Z

"A ludicrous bug": word choice

← Older revision		Revision as of 07:08, 9 October 2024
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	Do you want your possessions identified? [yn]		Do you want your possessions identified? [yn]

	~~For comparison, here~~ is an excerpt of lines 999-1012 from [[Source:NetHack 3.0.0/mhitu.c\|src/mhit.u]] in [[NetHack 3.0.0]], before the [[Riders]] were added:{{refsrc\|mhitu.c\|999\|nethack=3.0.0}}		The text below is an excerpt of lines 999-1012 from [[Source:NetHack 3.0.0/mhitu.c\|src/mhit.u]] in [[NetHack 3.0.0]], before the [[Riders]] were added:{{refsrc\|mhitu.c\|999\|nethack=3.0.0}}

	<syntaxhighlight lang="c">		<syntaxhighlight lang="c">
Line 68:		Line 68:
	break;</syntaxhighlight>		break;</syntaxhighlight>

	~~Below~~ is a partial excerpt of lines 1214-1258 from NetHack 3.1.0:<ref name="confusion"/>		For comparison, here is a partial excerpt of lines 1214-1258 from NetHack 3.1.0:<ref name="confusion"/>

	<syntaxhighlight lang="c">		<syntaxhighlight lang="c">

Umbire the Phantom: /* History */ finally do this up

2024-10-09T07:08:20Z

History: finally do this up

← Older revision		Revision as of 07:08, 9 October 2024
Line 43:		Line 43:

	==="A ludicrous bug"===		==="A ludicrous bug"===
	Yeenoghu is the subject of one of the longer-running [[software bug]]s in the history of ''NetHack''~~: the~~ [[Riders]] ~~were~~ introduced in [[NetHack 3.1.0]], with the code that handles their special attacks placed right after the code for Yeenoghu's confusion-inducing weapon attack~~{{refsrc\|mhitu.c\|1474}}~~ - this code was inserted carelessly~~, resulting~~ in ~~Yeenoghu using his weapon attack and then bringing out~~ [[Death (monster)\|Death]]'s deadly touch:{{refsrc\|mhitu.c\|~~1485~~}}		Yeenoghu is the subject of one of the longer-running [[software bug]]s in the history of ''NetHack''.

			The [[Riders]] are introduced in [[NetHack 3.1.0]], with the code that handles their special attacks placed right after the code for Yeenoghu's confusion-inducing weapon attack - this code was inserted carelessly without a break in the code to separate its [[damage type]] case from [[Death (monster)\|Death]]'s deadly touch, resulting in Yeenoghu using his weapon attack and then:{{refsrc\|mhitu.c\|1214\|nethack=3.1.0\|comment=<tt>AD_CONF</tt> case\|name="confusion"}}

	Yeenoghu reaches out with its deadly touch.--More--		Yeenoghu reaches out with its deadly touch.--More--
	Do you want your possessions identified? [yn]		Do you want your possessions identified? [yn]

	~~Contemporary source-divers thought this to be deliberate~~, ~~due to this comment at the end of Yeenoghu's section:~~		For comparison, here is an excerpt of lines 999-1012 from [[Source:NetHack 3.0.0/mhitu.c\|src/mhit.u]] in [[NetHack 3.0.0]], before the [[Riders]] were added:{{refsrc\|mhitu.c\|999\|nethack=3.0.0}}

	~~<syntaxhighlight lang="c">/* fall through to next case */</syntaxhighlight>~~

	~~Thus, for many years the bug was never reported until after the release~~ of [[NetHack 3.3.~~1]]. [[Pat Rankin]] of the [[DevTeam]] was made aware of this property in a [[rec.games.roguelike.nethack]] discussion, and called it "a ludicrous bug";<ref>[http:~~/~~/groups~~.~~google.com/group~~/~~rec.games.roguelike.nethack/browse_thread/thread/ae8d21ca5c42d00a/128792c7be721eb9?lnk=st&q=&rnum=2#128792c7be721eb9 Pat Rankin, "Re: YASQ: Yeenoghu". rec.games.roguelike.nethack, April 9, 2001~~.]~~</ref> The illicit death touch bug was finally fixed~~ in ~~time for~~ [[NetHack 3.4.0]].

	[[~~Umber hulk~~]]s were ~~not affected, because their confusion attack is handled in a different part of the code.~~{{refsrc\|mhitu.c\|~~1948}}~~

	~~These source excerpts might make clear the origin of the bug. Here is src/mhitu.c lines~~ 999~~-1012 from [[NetHack~~ 3.0.0~~]], which was before the [[Riders]] existed:~~

	<syntaxhighlight lang="c">		<syntaxhighlight lang="c">
Line 74:		Line 68:
	break;</syntaxhighlight>		break;</syntaxhighlight>

	~~Here~~ is a partial ~~quote~~ of ~~src/mhitu.c~~ lines 1214-1258 from [[NetHack 3.1.0~~]], the first version to implement the [[Riders]]~~:		Below is a partial excerpt of lines 1214-1258 from NetHack 3.1.0:<ref name="confusion"/>

	<syntaxhighlight lang="c">		<syntaxhighlight lang="c">
Line 93:		Line 87:
	break;</syntaxhighlight>		break;</syntaxhighlight>

	~~The Rider code was carelessly placed between~~ the ~~AD_CONF section, which handles~~ Yeenoghu's ~~confusion attack~~, and the ~~default section~~, ~~where~~ it ~~was supposed to finish~~. ~~Thus execution improperly proceeded into Death's touch attack~~.		Contemporary source-divers thought this to be deliberate, due to the comment about the fall through on line 1223 at the end of Yeenoghu's section, and thus the bug was never reported until after the release of [[NetHack 3.3.1]].{{refsrc\|mhitu.c\|1223\|nethack=3.1.0\|comment="/* fall through to next case */"}} [[Pat Rankin]] of the [[DevTeam]] was made aware of this property in a [[rec.games.roguelike.nethack]] discussion, and called it "a ludicrous bug"<ref>[http://groups.google.com/group/rec.games.roguelike.nethack/browse_thread/thread/ae8d21ca5c42d00a/128792c7be721eb9?lnk=st&q=&rnum=2#128792c7be721eb9 Pat Rankin, "Re: YASQ: Yeenoghu". rec.games.roguelike.nethack, April 9, 2001.]</ref> - said bug was written up as bug C331-96 and finally fixed in time for the release of [[NetHack 3.4.0]]. <ref>[https://www.nethack.org/v331/bugs.html NetHack 3.3.1 bugs]</ref> The fix itself is conceptually simple, by adding a <tt>dmg = 0;</tt> followed with a <tt>break;</tt> to properly close the damage type case, as illustrated by lines 1474-1486 of [[Source:NetHack 3.4.3/src/mhitu.c\|src/mhitu.c]] in [[NetHack 3.4.3]]:{{refsrc\|mhitu.c\|1474\|nethack=3.4.3}}

	~~The~~ bug was written up as bug C331-96<ref>[https://www.nethack.org/v331/bugs.html NetHack 3.3.1 bugs]</ref> ~~and was fixed in~~ [[NetHack 3.4.~~0]]~~. ~~Here is~~ src/mhitu.c ~~lines 1474-1486 from~~ [[NetHack 3.4.3]]:

	<syntaxhighlight lang="c">		<syntaxhighlight lang="c">
Line 112:		Line 104:
	pline("%s reaches out with its deadly touch.", Monnam(mtmp));		pline("%s reaches out with its deadly touch.", Monnam(mtmp));
	[... the rest of the Rider code ...]</syntaxhighlight>		[... the rest of the Rider code ...]</syntaxhighlight>

	~~The "dmg = 0;" and "break;" lines duplicate the ones in the default section, and Yeenoghu is restored to his pre-[[NetHack 3.1.0\|3.1.0]] behavior.~~

	==Origin==		==Origin==

Umbire the Phantom: wordsmith a bit here, double back later

2024-10-05T17:40:29Z

wordsmith a bit here, double back later

← Older revision		Revision as of 17:40, 5 October 2024
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	==Generation==		==Generation==
	Yeenoghu is not a valid ~~target~~ for [[polymorph]].		Yeenoghu is not a valid form for [[polymorph]].

	Yeenoghu is one of two demon lords alongside [[Juiblex]] that can be summoned by performing same-race [[sacrifice]], and will be peaceful for a chaotic [[hero]] and hostile otherwise. Yeenoghu also has a ~~very small~~ chance of being summoned by [[demon gating]], or via the [[summon nasties]] [[monster spell]] being cast either in Gehennom or by the [[Wizard of Yendor]].		Yeenoghu is one of two demon lords alongside [[Juiblex]] that can be summoned by performing same-race [[sacrifice]], and will be peaceful for a chaotic [[hero]] and hostile otherwise. Yeenoghu also has a chance of being summoned by [[demon gating]], or via the [[summon nasties]] [[monster spell]] being cast either in Gehennom or by the [[Wizard of Yendor]].

	Yeenoghu is [[Monster starting inventory\|always generated with]] a [[flail]].		Yeenoghu is [[Monster starting inventory\|always generated with]] a [[flail]].
Line 40:		Line 40:

	==History==		==History==
	Yeenoghu ~~first appears~~ in [[NetHack 3.0.0]].		Yeenoghu is introduced along with the other named demons in [[NetHack 3.0.0]].

	==="A ludicrous bug"===		==="A ludicrous bug"===
	Yeenoghu is the subject of one of the ~~longeer~~-running ~~bugs~~ in the history of ''NetHack'': the [[Riders]] were introduced in [[NetHack 3.1.0]], with the code that handles their special attacks placed right after the code for Yeenoghu's confusion-inducing weapon attack{{refsrc\|mhitu.c\|1474}} - this code was inserted carelessly, resulting in Yeenoghu using his weapon attack and then bringing out [[Death (monster)\|Death]]'s deadly touch:{{refsrc\|mhitu.c\|1485}}		Yeenoghu is the subject of one of the longer-running [[software bug]]s in the history of ''NetHack'': the [[Riders]] were introduced in [[NetHack 3.1.0]], with the code that handles their special attacks placed right after the code for Yeenoghu's confusion-inducing weapon attack{{refsrc\|mhitu.c\|1474}} - this code was inserted carelessly, resulting in Yeenoghu using his weapon attack and then bringing out [[Death (monster)\|Death]]'s deadly touch:{{refsrc\|mhitu.c\|1485}}

	Yeenoghu reaches out with its deadly touch.--More--		Yeenoghu reaches out with its deadly touch.--More--
	Do you want your possessions identified? [yn]		Do you want your possessions identified? [yn]

	A comment at the end of Yeenoghu's section ~~read~~:		Contemporary source-divers thought this to be deliberate, due to this comment at the end of Yeenoghu's section:

	<syntaxhighlight lang="c">/* fall through to next case */</syntaxhighlight>		<syntaxhighlight lang="c">/* fall through to next case */</syntaxhighlight>

	~~Contemporary source-divers thought from this that the behavior was deliberate; thus~~, for many years the bug was never reported.		Thus, for many years the bug was never reported until after the release of [[NetHack 3.3.1]]. [[Pat Rankin]] of the [[DevTeam]] was made aware of this property in a [[rec.games.roguelike.nethack]] discussion, and called it "a ludicrous bug";<ref>[http://groups.google.com/group/rec.games.roguelike.nethack/browse_thread/thread/ae8d21ca5c42d00a/128792c7be721eb9?lnk=st&q=&rnum=2#128792c7be721eb9 Pat Rankin, "Re: YASQ: Yeenoghu". rec.games.roguelike.nethack, April 9, 2001.]</ref> The illicit death touch bug was finally fixed in time for [[NetHack 3.4.0]].

	[[Pat Rankin]] of the [[DevTeam]] was made aware of this property in a [[rec.games.roguelike.nethack]] discussion, and called it "a ludicrous bug";<ref>[http://groups.google.com/group/rec.games.roguelike.nethack/browse_thread/thread/ae8d21ca5c42d00a/128792c7be721eb9?lnk=st&q=&rnum=2#128792c7be721eb9 Pat Rankin, "Re: YASQ: Yeenoghu". rec.games.roguelike.nethack, April 9, 2001.]</ref> ~~the then-current version was [[NetHack 3.3.1]], and the~~ illicit death touch bug was finally fixed in time for [[NetHack 3.4.0]].

	[[Umber hulk]]s were not affected, because their confusion attack is handled in a different part of the code.{{refsrc\|mhitu.c\|1948}}		[[Umber hulk]]s were not affected, because their confusion attack is handled in a different part of the code.{{refsrc\|mhitu.c\|1948}}

Umbire the Phantom: get a start on formatting

2024-10-04T15:27:27Z

get a start on formatting

← Older revision		Revision as of 15:27, 4 October 2024
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	\|frequency=Unique		\|frequency=Unique
	\|genocidable=No		\|genocidable=No
	\|attacks=Weapon 3d6, weapon 2d8 [[confusion]], claw 1d6 ~~(paralyzing)~~, [[magic missile]] ~~2d6~~		\|attacks=Weapon 3d6, weapon 2d8 [[confusion]], claw 1d6 [[paralyze]], [[Monster spell\|spellcasting]] 2d6 [[magic missile]]
	\|weight=900		\|weight=900
	\|nutr=500		\|nutr=500
	\|size=Large		\|size=Large
	\|resistances=Poison, fire		\|resistances=[[Poison resistance]], [[fire resistance]], [[magic resistance]]
	\|resistances conveyed=None		\|resistances conveyed=None
	\|attributes={{attributes\|Yeenoghu\|nocorpse=1\|hell=1\|fly=1\|seeinvis=1\|pois=1\|nopoly=1\|demon=1\|stalk=1\|hostile=1\|nasty=1\|lord=1\|male=1\|collect=1\|wantsamul=1\|infravisible=1\|infravision=1}}		\|attributes={{attributes\|Yeenoghu\|nocorpse=1\|hell=1\|fly=1\|seeinvis=1\|pois=1\|nopoly=1\|demon=1\|stalk=1\|hostile=1\|nasty=1\|lord=1\|male=1\|collect=1\|wantsamul=1\|infravisible=1\|infravision=1}}
	\|reference=[[monst.c#line2674]]		\|reference=[[monst.c#line2674]]
	}}		}}
	'''Yeenoghu''', {{monsym\|yeenoghu}}, is a [[monster]] that appears in [[NetHack]]. He is ~~one~~ of the [[~~demon lord~~]]s.		'''Yeenoghu''', {{monsym\|yeenoghu}}, is a [[unique]] [[monster]] that appears in ''[[NetHack]]''. He is a [[demon lord]] that is [[covetous]] and capable of warping, and desires the [[Amulet of Yendor]]. Yeenoghu has [[infravision]] and can be seen via infravision, and can also [[fly]], [[see invisible]], and pick up items that he comes across.

			Yeenoghu has a weapon attack, a second weapon attack that inflicts confusion, a claw attack that can [[paralyze]] the target, and the ability to fire [[magic missile]]s. Yeenoghu possesses [[poison resistance]] and [[fire resistance]], [[magic resistance]] from his magic missile attack, and [[drain resistance]] and [[death resistance]] like all [[M2_DEMON\|demons]].

			Yeenoghu is [[poisonous]] to eat, which primarily comes up if he is [[digested]] by another monster.

	==Generation==		==Generation==
	Yeenoghu [[~~monster starting inventory\|~~is ~~always generated with~~]] a [[~~flail~~]].		Yeenoghu is not a valid target for [[polymorph]].

			Yeenoghu is one of two demon lords alongside [[Juiblex]] that can be summoned by performing same-race [[sacrifice]], and will be peaceful for a chaotic [[hero]] and hostile otherwise. Yeenoghu also has a very small chance of being summoned by [[demon gating]], or via the [[summon nasties]] [[monster spell]] being cast either in Gehennom or by the [[Wizard of Yendor]].

	Yeenoghu is ~~one of the two named demons that can be summoned with same-race~~ [[~~sacrifice~~]]. If the player is [[lawful]] or [[neutral]] when performing this type of sacrifice, Yeenoghu will be hostile when summoned; if the player is [[chaotic]], they will be peaceful. There is also a {{frac\|260}} chance that a [[~~water demon]] may [[gate]] in Yeenoghu or [[Juiblex~~]].		Yeenoghu is [[Monster starting inventory\|always generated with]] a [[flail]].

	==Strategy==		==Strategy==
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	==="A ludicrous bug"===		==="A ludicrous bug"===
	Yeenoghu is the subject of one of the ~~longest~~-running bugs in NetHack ~~history. In~~ [[NetHack 3.1.0]], the ~~[[Riders]] were introduced. The~~ code that handles their special attacks ~~comes~~ right after ~~that which handles~~ Yeenoghu's [[confusion]] attack.{{refsrc\|mhitu.c\|1474}} ~~Early versions had~~ this code inserted carelessly~~; consequently~~, ~~after~~ Yeenoghu ~~used~~ his ~~confusion~~ attack~~, execution would proceed into the section that handles~~ [[Death (monster)\|Death]]'s touch:{{refsrc\|mhitu.c\|1485}}		Yeenoghu is the subject of one of the longeer-running bugs in the history of ''NetHack'': the [[Riders]] were introduced in [[NetHack 3.1.0]], with the code that handles their special attacks placed right after the code for Yeenoghu's confusion-inducing weapon attack{{refsrc\|mhitu.c\|1474}} - this code was inserted carelessly, resulting in Yeenoghu using his weapon attack and then bringing out [[Death (monster)\|Death]]'s deadly touch:{{refsrc\|mhitu.c\|1485}}

	Yeenoghu reaches out with its deadly touch.--More--		Yeenoghu reaches out with its deadly touch.--More--
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	In [[EvilHack]], Yeenoghu now generates with an [[artifact]] [[triple-headed flail]] called [[Butcher]], and his magic missile attack is buffed from 2d6 to 6d6.		In [[EvilHack]], Yeenoghu now generates with an [[artifact]] [[triple-headed flail]] called [[Butcher]], and his magic missile attack is buffed from 2d6 to 6d6.

	== Encyclopedia entry ==		==Encyclopedia entry==

	{{encyclopedia\|		{{encyclopedia\|
	Yeenoghu, the demon lord of gnolls, still exists although all his followers have been wiped off the face of the earth. He casts magic projectiles at those close to him, and a mere gaze into his piercing eyes may hopelessly confuse the battle-weary adventurer.		Yeenoghu, the demon lord of gnolls, still exists although all his followers have been wiped off the face of the earth. He casts magic projectiles at those close to him, and a mere gaze into his piercing eyes may hopelessly confuse the battle-weary adventurer.

Tomsod: /* Strategy */ all & are death resistant

2024-10-03T07:14:49Z

Strategy: all & are death resistant

← Older revision		Revision as of 07:14, 3 October 2024
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	==Strategy==		==Strategy==
	Yeenoghu can deal out tremendous physical damage if you lack [[free action]] and [[MC3]]; his melee attacks can also gate in other [[major demon]]s, and he can zap you with [[magic missile]]s as well, meaning he is immune to them ~~and [[wand of death\|death rays]]~~ on top of his high [[monster magic resistance]]. However, Yeenoghu is not generally a problem if you are prepared for him.		Yeenoghu can deal out tremendous physical damage if you lack [[free action]] and [[MC3]]; his melee attacks can also gate in other [[major demon]]s, and he can zap you with [[magic missile]]s as well, meaning he is himself immune to them on top of his high [[monster magic resistance]]. However, Yeenoghu is not generally a problem if you are prepared for him.

	Like other demon princes, Yeenoghu is [[covetous]] and will teleport next to you to deliver melee attacks and fire magic missiles. When at low health, he will teleport to the upstair tile to regenerate, and will escape up them if approached too closely; the usual strategies for covetous monsters apply, including obstructing the upstair or else luring him to a floor with a blocked upstair. As he is able to summon [[Demogorgon]] directly, dispatching him quickly is advised.		Like other demon princes, Yeenoghu is [[covetous]] and will teleport next to you to deliver melee attacks and fire magic missiles. When at low health, he will teleport to the upstair tile to regenerate, and will escape up them if approached too closely; the usual strategies for covetous monsters apply, including obstructing the upstair or else luring him to a floor with a blocked upstair. As he is able to summon [[Demogorgon]] directly, dispatching him quickly is advised.

Umbire the Phantom: bit of cleanup before a more formal pass

2024-06-22T05:07:26Z

bit of cleanup before a more formal pass

← Older revision		Revision as of 05:07, 22 June 2024
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	===EvilHack===		===EvilHack===
	In [[EvilHack]], Yeenoghu now generates with an [[artifact]] [[triple-headed flail]] called [[Butcher]], and his magic missile attack is buffed from 2d6 to 6d6.~~<nowiki></nowiki>~~		In [[EvilHack]], Yeenoghu now generates with an [[artifact]] [[triple-headed flail]] called [[Butcher]], and his magic missile attack is buffed from 2d6 to 6d6.

	== Encyclopedia entry ==		== Encyclopedia entry ==

Furey: http -> https for nethack.org. nethack.org emits red-letter warning for http.

2024-06-21T00:17:58Z

http -> https for nethack.org. nethack.org emits red-letter warning for http.

← Older revision		Revision as of 00:17, 21 June 2024
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	The Rider code was carelessly placed between the AD_CONF section, which handles Yeenoghu's confusion attack, and the default section, where it was supposed to finish. Thus execution improperly proceeded into Death's touch attack.		The Rider code was carelessly placed between the AD_CONF section, which handles Yeenoghu's confusion attack, and the default section, where it was supposed to finish. Thus execution improperly proceeded into Death's touch attack.

	The bug was written up as bug C331-96<ref>[~~http~~://www.nethack.org/v331/bugs.html NetHack 3.3.1 bugs]</ref> and was fixed in [[NetHack 3.4.0]]. Here is src/mhitu.c lines 1474-1486 from [[NetHack 3.4.3]]:		The bug was written up as bug C331-96<ref>[https://www.nethack.org/v331/bugs.html NetHack 3.3.1 bugs]</ref> and was fixed in [[NetHack 3.4.0]]. Here is src/mhitu.c lines 1474-1486 from [[NetHack 3.4.3]]:

	<syntaxhighlight lang="c">		<syntaxhighlight lang="c">