Difference between revisions of "Altar"

From NetHackWiki
Jump to navigation Jump to search
(potholes and some cleanup)
(Reorganize. Copy edit. Update facts to 3.6.7. Update refs to 3.6.7. Check facts against source code. Fix encyclopedia entry.)
Line 1: Line 1:
 
{{features}}
 
{{features}}
{{Wikipedia|Altar}}
 
 
{{religion}}
 
{{religion}}
An '''altar''', represented by an underscore ({{lightgray|_}}), is a place where you may worship [[god]]s. [[Temple]]s contain an altar and an [[aligned priest]].
+
An '''altar''' is a [[dungeon feature]] that appears in ''[[NetHack]]'' and is represented by an underscore, {{lightgray|_}}. A [[temple]] is a [[special room]] that contains an altar and an [[aligned priest]], or a high altar and a [[high priest]].
  
Altars are '''co-aligned''' if they are of the same [[alignment]] as you and '''cross-aligned''' if they are of a different alignment. To determine if an altar is co-aligned, either use [[far look]] or stand on it and use close look. Altars of Moloch are '''unaligned'''. Unaligned altars appear only in Gehennom, one variant of [[Minetown]] and some quests (except as [[mimic]]s).
+
An altar is '''co-aligned''' if its [[alignment]] matches your alignment and '''cross-aligned''' if its alignment differs from your alignment. An altar of [[Moloch]] is '''unaligned'''. To determine the alignment of an altar, either use [[far look]] or stand on it and use [[near look]].
  
Altars are scattered randomly throughout the dungeons. [[Minetown]] has a randomly aligned altar and unaligned altars can be found in the [[Valley of the Dead]] (in the temple of [[Moloch]]), Orcus-town and Moloch's Sanctum unless they were destroyed in a [[bones]] file. [[Orcish Town]], the variant of Minetown that has been overrun by [[Orc (monster class)|orcs]], has an unaligned altar.
+
Most ways of interacting with an altar break [[atheist]] conduct.
  
Altars can be used to detect the [[beatitude]] of items. This is done by dropping the item onto the altar. A black flash marks a cursed item, and an amber flash marks a blessed one. You cannot detect an item's beatitude if you are [[blind]]. You cannot detect whether an item is blessed or cursed if you are [[hallucination|hallucinating]], as you will not be able to distinguish between amber flashes and black flashes; you can, however, identify uncursed items, as there will not be a flash at all.{{reffunc|do.c|doaltarobj|name=doaltar}}
+
== Generation ==
  
If you #[[sit]] on, [[engrave]] on, or [[kick]] an altar, you will experience negative effects depending on the altar alignment and your [[alignment record]].{{refsrc|src/sit.c|137|nethack=3.6.7}}{{refsrc|src/engrave.c|576|nethack=3.6.7}}{{refsrc|src/dokick.c|1061|nethack=3.6.7}} If the altar is co-aligned and your alignment record is greater than -[[rn2]](4), you lose one point of wisdom and one point of alignment record; otherwise, you lose 0-2 points of Luck, if your Luck is greater than -5.{{refsrc|src/pray.c|2232|nethack=3.6.7}} This can be used to deliberately lower your [[Luck]] or [[alignment record]] to prevent [[crowning]], and does not break [[atheist]] conduct.
+
Randomly generated altars appear in ordinary room and corridor levels in the [[Dungeons of Doom]]. There is an independent 1 in 60 chance of each [[special room|non-special room]] containing an altar; this chance does not depend on dungeon level.{{refsrc|nethack=3.6.7|src/mklev.c|832}} A randomly generated altar has an equal probability of each of the three alignments and is never unaligned. A randomly generated altar will not be adjacent to a door (diagonal is okay), but otherwise can occupy any spot in the room not already occupied by something else.{{refsrc|nethack=3.6.7|src/mklev.c|1613|comment=function mkaltar}}
  
If you (or a monster) zap a [[wand of digging]] downwards, you get the message ''"The digging ray is ineffective"'' and nothing further happens. However, if you break a [[wand of digging]] or [[apply]] a [[drum of earthquake]] while standing on an altar, it will be destroyed (unless it is a high altar).
+
In addition, there are several guaranteed altars. Every layout of [[Minetown]] has a temple with a randomly aligned altar; except for [[Orcish Town]], which has an unaligned altar (and no temple). Some [[quests]] have altars. In [[Gehennom]], the [[Valley of the Dead]] has a temple of [[Moloch]] with an unaligned altar; Orcus-town has an unaligned altar; and [[Moloch's Sanctum]] has a temple of Moloch with a high altar.
  
Standing on any altar [[scare]]s [[vampire]]s as if you were standing on [[Elbereth]] or a [[scroll of scare monster]].{{refsrc|monmove.c|129}}
+
== Use ==
  
Randomly generated altars appear in ordinary room and corridor levels in the [[Dungeons of Doom]]. There is an independent 1 in 60 chance of each [[special room|non-special]] room containing an altar,{{refsrc|mklev.c|785}} which gives a 93% chance of at least one. The altar has an equal probability of each of the three alignments. Altars will not be generated adjacent to doors (diagonal is okay), but otherwise can occupy any spot in the room not already occupied by something else.{{refsrc|mklev.c|1353}} The chance of an empty room containing an altar does not change with dungeon level.
+
=== Detecting beatitude ===
  
==Sacrificing corpses==
+
If you [[drop]] an object on altar, the altar will reveal the [[beatitude]] of the object.{{refsrc|nethack=3.6.7|src/do.c|269|comment=function doaltarobj}} (This works only if you drop the object, not if a monster drops the object or the object is thrown.) A black flash marks a cursed item, and an amber flash marks a blessed one. You cannot detect an item's beatitude if you are [[blind]]. You cannot detect whether an item is blessed or cursed if you are [[hallucinating]], as the flashes will have hallucinatory colors; you can, however, detect uncursed items, as there will not be a flash at all.
 +
 
 +
=== Sacrificing corpses ===
 
{{main|Sacrifice}}
 
{{main|Sacrifice}}
 +
 
Sacrificing fresh corpses is a useful way to reduce your prayer timeout, increase your luck, gain powerful [[artifact weapon]]s, and improve your [[alignment]] (particularly if your god is unhappy with you). In [[SLASH'EM]], you can also have wielded and worn items [[blessed]] and gain powerful [[minion]]s through sacrifice. [[Sacrifice|Sacrificing]] at the altar of another god has a chance of converting that altar to your alignment, potentially angering that god. Note that it also has a chance of converting ''you'' to that altar's alignment, angering your god and making it difficult or impossible to complete the [[quest]] if you haven't already done so.
 
Sacrificing fresh corpses is a useful way to reduce your prayer timeout, increase your luck, gain powerful [[artifact weapon]]s, and improve your [[alignment]] (particularly if your god is unhappy with you). In [[SLASH'EM]], you can also have wielded and worn items [[blessed]] and gain powerful [[minion]]s through sacrifice. [[Sacrifice|Sacrificing]] at the altar of another god has a chance of converting that altar to your alignment, potentially angering that god. Note that it also has a chance of converting ''you'' to that altar's alignment, angering your god and making it difficult or impossible to complete the [[quest]] if you haven't already done so.
  
==Making holy/unholy water==
+
=== Prayer ===
If you drop one or more [[potions of water]] onto an altar and #[[pray]], the potions become [[potion of holy water|blessed]] if the altar was aligned with you and become [[potion of unholy water|cursed]] if the altar was not aligned with you. This occurs regardless of whether the water was blessed or cursed before. Be aware that water praying on a cross-aligned altar will anger your god, decrease your luck, and possibly cause you to be punished in some other way.
+
 
 +
{{main|Prayer}}
 +
A prayer on a co-aligned altar has enhanced benefits.
  
 
Normal prayer timeouts apply when praying on altars.
 
Normal prayer timeouts apply when praying on altars.
  
==Altar camping==
+
=== Making holy/unholy water ===
It is generally possible to survive indefinitely on a level with an altar. Under normal circumstances, the need for food drives you to deeper unexplored levels. However, you can instead pray when weak, and sacrifice to reduce your prayer timeout back to zero. Doing this for extended periods of time can net you many [[death drop]]s, as well as a collection of gifts from your god if your luck is substantially high. This is considered by some to be [[cheating|degenerate]].
+
{{main|Prayer#Water prayer}}
 +
 
 +
If you drop one or more [[potions of water]] onto an altar and [[pray]], the potions may become [[holy water]] or [[unholy water]].{{refsrc|nethack=3.6.7|src/pray.c|1230|comment=function water_prayer}} A [[prayer#Successful prayers|successful prayer]] on a co-aligned altar makes holy water. An unsuccessful prayer, or a prayer on a cross-aligned or unaligned alter, usually makes unholy water (but sometimes has no effect on the water). This occurs regardless of whether the water was blessed or cursed before. Be aware that prayer has other effects, especially prayer on a cross-aligned or unaligned altar.
 +
 
 +
=== Scaring monsters ===
 +
 
 +
Standing on any altar (even an unaligned altar) [[scare]]s [[vampire]]s as if you were standing on [[Elbereth]] or a [[scroll of scare monster]].{{refsrc|nethack=3.6.7|src/monmove.c|153}} This does not break [[atheist]] conduct.
 +
 
 +
=== Misusing an altar ===
 +
 
 +
If you [[sit]] on,{{refsrc|nethack=3.6.7|src/sit.c|137}} [[engrave]] on,{{refsrc|nethack=3.6.7|src/engrave.c|576}} or [[kick]]{{refsrc|nethack=3.6.7|src/dokick.c|1061}} an altar, you will experience negative effects depending on the altar alignment and your [[alignment record]].{{refsrc|nethack=3.6.7|src/pray.c|2232|comment=function altar_wrath}}
 +
If the altar is co-aligned and your alignment record is greater than -[[rn2]](4), you lose one point of wisdom and one point of alignment record; otherwise, if your luck is greather than -5; you lose 0-2 points of luck.
 +
 
 +
Misusing an altar does not break [[atheist]] conduct.
 +
 
 +
=== Digging an altar ===
 +
 
 +
If you (or a monster) zap a [[wand of digging]] downwards while on an altar, the digging ray is ineffective, and nothing further happens. If you break a [[wand of digging]] or apply a [[drum of earthquake]], altars are not affected.
 +
 
 +
== High altars ==
 +
 
 +
The three altars on the [[Astral Plane]] and the altar in [[Moloch's Sanctum]] are '''high altars'''. They act largely as normal altars, but cannot be converted under any circumstances; doing so will cause the god in question to zap you and, failing this, will summon three [[minion]]s to protect the altar.
 +
 
 +
To [[ascend]], you must offer the [[Amulet of Yendor]] on the co-aligned high altar.
 +
 
 +
The [[far look]] command does not reveal the alignment of a high altar, saying only ''aligne'' or ''unaligned''. ''aligned'' does not mean ''co-aligned with you''!
 +
 
 +
== Strategy ==
 +
 
 +
An altar is an excellent source of [[artifact weapons]], [[intrinsic protection]], other [[intrinsic property|intrinsic properties]], [[spellbooks]], [[holy water]], [[nutrition]], and other benefits. Because nutrition is available through prayer, it is possible to stay at an altar indefinitely, a practice known as [[altar farming]].
 +
 
 +
Misusing an altar can be used deliberately lower your [[luck]] or [[alignment record]] to prevent [[crowning]]. You can use a [[ring of sustain ability]] or a noncursed [[unicorn horn]] to counter wisdom loss, and a [[MSGTYPE]] to hide the complaints from the altar's god.
  
In older versions, this was most effectively done with [[black pudding]]s or [[brown pudding]]s, which was known as "[[pudding farming]]"; [[brown pudding]]s were less suitable for farming due to a lower sacrifice value, the inability to be summoned by kicking a sink, and their tendency to not leave a corpse (meaning more work and fewer death drops), but this was offset by their lack of a damaging attack, allowing them to be farmed more safely by physically weak or low level characters. As of Nethack 3.6.0, however, puddings no longer leave corpses at all, rendering this strategy totally ineffective.
+
To find the correct high altar on the [[Astral Plane]], you can:
 +
* visit each of the high altars
 +
* zap a [[wand of probing]] at a [[high priest]]
 +
* note if you are given [[sanctuary]] in a particular temple
 +
* use a [[helm of opposite alignment]] to change your alignment opportunistically
  
==High altars==
+
== History ==
The three altars on the [[Astral Plane]] and the altar in [[Moloch's Sanctum]] are considered to be '''high altars'''. They act largely as normal altars, but cannot be converted under any circumstances; doing so will cause the god in question to attempt to zap you and, failing this, will summon three minions to protect the altar. In addition, it is not possible to sacrifice monsters unless you are holding them (to prevent sacrificing the [[Riders]]).
 
  
To correctly ascend, one must #offer the real [[Amulet of Yendor]] (held in main inventory, not dropped on the altar) at the altar of your [[alignment]]. Determining the alignment of the altar requires standing on its location and using the {{kbd|:}} (look) command. The {{kbd|;}} (farlook) command does not give information about a high altar's alignment (it merely calls it "aligned," which does not mean "coaligned with you," [[Lessons learned the hard way|as a number of new players learn the hard way]]). Other methods to detect the correct altar are to zap a [[wand of probing|probing]] at the [[high priest]], or to note if you are given [[sanctuary]] (that is, all monsters other than the [[Riders]], [[aligned priest]], and [[angelic being]]s, will not be allowed to enter and cannot attack you with melee attacks). If the version of NetHack you are playing on has not fixed the [[Astral call bug]], that is also a possibility.
+
In NetHack 3.4.3 and earlier, including variants based on those versions, [[pudding farming]] was a strategy for generating large numbers of corpses for altar fodder by repeatedly splitting puddings.
  
You can destroy the [[chaotic]] altar with non-chaotic same-[[race]] [[sacrifice]], but you cannot convert the others.
+
In NetHack 3.4.3 and earlier, including variants based on those versions, breaking a [[wand of digging]] or applying a [[drum of earthquake]] would destroy an altar.
  
==Hallucinating colors==
+
In NetHack 3.4.3 and earlier, including variants based on those versions, the [[Astral call bug]] enabled players to find the correct high altar trivially.
If you drop a blessed or cursed item on an altar while [[hallucination|hallucinating]] you will see a <color> flash, where <color> is randomly selected from: "ultraviolet", "infrared", "bluish-orange", "reddish-green", "dark white", "light black", "sky blue-pink", "salty", "sweet", "sour", "bitter", "striped", "spiral", "swirly", "plaid", "checkered", "argyle", "paisley", "blotchy", "guernsey-spotted", "polka-dotted", "square", "round", "triangular", "cabernet", "sangria", "fuchsia", "wisteria", "lemon-lime", "strawberry-banana", "peppermint", "romantic", "incandescent".<ref name=doaltar />{{reffunc|do_name.c|hcolor}}
 
  
==Encyclopedia entry==
+
== Encyclopedia entry ==
 
{{encyclopedia|
 
{{encyclopedia|
 
Altars are of three types:
 
Altars are of three types:
1.  In Temples.  These are for Sacrifices [...].  The stone top will have grooves for blood, and the whole will be covered with _dry brown stains of a troubling kind_ from former Sacrifices.
+
1.  In Temples.  These are for Sacrifices [...].  The stone
 +
top will have grooves for blood, and the whole will be covered
 +
with _dry brown stains of a troubling kind_ from former
 +
Sacrifices.
 
{{right-align|[ The Tough Guide to Fantasyland, by Diana Wynne Jones ]}}
 
{{right-align|[ The Tough Guide to Fantasyland, by Diana Wynne Jones ]}}
  
Line 57: Line 97:
 
}}
 
}}
  
==Variants==
+
== Variants ==
Players of [[NetHack brass]] and [[SLASH'EM]] need to be wary when converting altars, because of the increased chance that the altar's original god will dispatch a [[minion]] against you. At [[experience level]] 7 or above with high [[alignment]], the chance of a minion appearing after converting the altar is the same as vanilla.{{refsrc|pray.c|1606|version=SLASH'EM 0.0.7E7F2}}{{refsrc|pray.c|1396}} As in vanilla, the god will yell, "Thou shalt pay for thy indiscretion!"{{refsrc|minion.c|128}} Players with a high [[luck]] will have fewer minions dispatched against them.
+
Players of [[NetHack brass]] and [[SLASH'EM]] need to be wary when converting altars, because of the increased chance that the altar's original god will dispatch a [[minion]] against you.{{refsrc|pray.c|1606|version=SLASH'EM 0.0.7E7F2}} Players with a high [[luck]] will have fewer minions dispatched against them.
  
 
Even worse, there's an additional chance of one or more minions appearing post-conversion. In SLASH'EM, if you are at experience level 4 or above, there is a chance that "You feel (god) is very angry at you!" and the god dispatches two minions.{{refsrc|pray.c|1583|version=SLASH'EM 0.0.7E7F2}} Afterwards, you still have the original chance of another minion, as above. Again, [[luck]] is a factor.
 
Even worse, there's an additional chance of one or more minions appearing post-conversion. In SLASH'EM, if you are at experience level 4 or above, there is a chance that "You feel (god) is very angry at you!" and the god dispatches two minions.{{refsrc|pray.c|1583|version=SLASH'EM 0.0.7E7F2}} Afterwards, you still have the original chance of another minion, as above. Again, [[luck]] is a factor.
Line 66: Line 106:
 
Also, there seems to be a possibility in SLASH'EM to have equipment being worn blessed if you sacrifice enough.
 
Also, there seems to be a possibility in SLASH'EM to have equipment being worn blessed if you sacrifice enough.
  
==See also==
+
== See also ==
[[Prayer]] is closely related to sacrifice. See that page for altar-related [[intrinsic]]s, [[crowning]], etc.
+
* [[Prayer]]
 +
* [[Sacrifice]]
  
==References==
+
== References ==
<references />
+
<references/>
  
{{nethack-343|offset=1}}
+
{{nethack-367|offset=1}}
 
{{featured}}
 
{{featured}}
  
 
[[Category:Dungeon features]]
 
[[Category:Dungeon features]]
 
[[Category:Religion]]
 
[[Category:Religion]]

Revision as of 21:06, 8 July 2024

An altar is a dungeon feature that appears in NetHack and is represented by an underscore, _. A temple is a special room that contains an altar and an aligned priest, or a high altar and a high priest.

An altar is co-aligned if its alignment matches your alignment and cross-aligned if its alignment differs from your alignment. An altar of Moloch is unaligned. To determine the alignment of an altar, either use far look or stand on it and use near look.

Most ways of interacting with an altar break atheist conduct.

Generation

Randomly generated altars appear in ordinary room and corridor levels in the Dungeons of Doom. There is an independent 1 in 60 chance of each non-special room containing an altar; this chance does not depend on dungeon level.[1] A randomly generated altar has an equal probability of each of the three alignments and is never unaligned. A randomly generated altar will not be adjacent to a door (diagonal is okay), but otherwise can occupy any spot in the room not already occupied by something else.[2]

In addition, there are several guaranteed altars. Every layout of Minetown has a temple with a randomly aligned altar; except for Orcish Town, which has an unaligned altar (and no temple). Some quests have altars. In Gehennom, the Valley of the Dead has a temple of Moloch with an unaligned altar; Orcus-town has an unaligned altar; and Moloch's Sanctum has a temple of Moloch with a high altar.

Use

Detecting beatitude

If you drop an object on altar, the altar will reveal the beatitude of the object.[3] (This works only if you drop the object, not if a monster drops the object or the object is thrown.) A black flash marks a cursed item, and an amber flash marks a blessed one. You cannot detect an item's beatitude if you are blind. You cannot detect whether an item is blessed or cursed if you are hallucinating, as the flashes will have hallucinatory colors; you can, however, detect uncursed items, as there will not be a flash at all.

Sacrificing corpses

Main article: Sacrifice

Sacrificing fresh corpses is a useful way to reduce your prayer timeout, increase your luck, gain powerful artifact weapons, and improve your alignment (particularly if your god is unhappy with you). In SLASH'EM, you can also have wielded and worn items blessed and gain powerful minions through sacrifice. Sacrificing at the altar of another god has a chance of converting that altar to your alignment, potentially angering that god. Note that it also has a chance of converting you to that altar's alignment, angering your god and making it difficult or impossible to complete the quest if you haven't already done so.

Prayer

Main article: Prayer

A prayer on a co-aligned altar has enhanced benefits.

Normal prayer timeouts apply when praying on altars.

Making holy/unholy water

Main article: Prayer#Water prayer

If you drop one or more potions of water onto an altar and pray, the potions may become holy water or unholy water.[4] A successful prayer on a co-aligned altar makes holy water. An unsuccessful prayer, or a prayer on a cross-aligned or unaligned alter, usually makes unholy water (but sometimes has no effect on the water). This occurs regardless of whether the water was blessed or cursed before. Be aware that prayer has other effects, especially prayer on a cross-aligned or unaligned altar.

Scaring monsters

Standing on any altar (even an unaligned altar) scares vampires as if you were standing on Elbereth or a scroll of scare monster.[5] This does not break atheist conduct.

Misusing an altar

If you sit on,[6] engrave on,[7] or kick[8] an altar, you will experience negative effects depending on the altar alignment and your alignment record.[9] If the altar is co-aligned and your alignment record is greater than -rn2(4), you lose one point of wisdom and one point of alignment record; otherwise, if your luck is greather than -5; you lose 0-2 points of luck.

Misusing an altar does not break atheist conduct.

Digging an altar

If you (or a monster) zap a wand of digging downwards while on an altar, the digging ray is ineffective, and nothing further happens. If you break a wand of digging or apply a drum of earthquake, altars are not affected.

High altars

The three altars on the Astral Plane and the altar in Moloch's Sanctum are high altars. They act largely as normal altars, but cannot be converted under any circumstances; doing so will cause the god in question to zap you and, failing this, will summon three minions to protect the altar.

To ascend, you must offer the Amulet of Yendor on the co-aligned high altar.

The far look command does not reveal the alignment of a high altar, saying only aligne or unaligned. aligned does not mean co-aligned with you!

Strategy

An altar is an excellent source of artifact weapons, intrinsic protection, other intrinsic properties, spellbooks, holy water, nutrition, and other benefits. Because nutrition is available through prayer, it is possible to stay at an altar indefinitely, a practice known as altar farming.

Misusing an altar can be used deliberately lower your luck or alignment record to prevent crowning. You can use a ring of sustain ability or a noncursed unicorn horn to counter wisdom loss, and a MSGTYPE to hide the complaints from the altar's god.

To find the correct high altar on the Astral Plane, you can:

History

In NetHack 3.4.3 and earlier, including variants based on those versions, pudding farming was a strategy for generating large numbers of corpses for altar fodder by repeatedly splitting puddings.

In NetHack 3.4.3 and earlier, including variants based on those versions, breaking a wand of digging or applying a drum of earthquake would destroy an altar.

In NetHack 3.4.3 and earlier, including variants based on those versions, the Astral call bug enabled players to find the correct high altar trivially.

Encyclopedia entry

Altars are of three types:
1. In Temples. These are for Sacrifices [...]. The stone
top will have grooves for blood, and the whole will be covered
with _dry brown stains of a troubling kind_ from former
Sacrifices.

[ The Tough Guide to Fantasyland, by Diana Wynne Jones ]


To every man upon this earth
Death cometh soon or late;
And how can man die better
Than facing fearful odds
For the ashes of his fathers
And the temples of his gods?

[ Lays of Ancient Rome, by Thomas B. Macaulay ]

Variants

Players of NetHack brass and SLASH'EM need to be wary when converting altars, because of the increased chance that the altar's original god will dispatch a minion against you.[10] Players with a high luck will have fewer minions dispatched against them.

Even worse, there's an additional chance of one or more minions appearing post-conversion. In SLASH'EM, if you are at experience level 4 or above, there is a chance that "You feel (god) is very angry at you!" and the god dispatches two minions.[11] Afterwards, you still have the original chance of another minion, as above. Again, luck is a factor.

In NetHack brass, you will always receive "You feel (god) is very angry at you!" For all experience levels, at least one minion will appear. Two rolls are made: the first from 0 to 9, the second from 0 to 19. For each roll, if your level is less than the generated random number, a post-conversion minion is summoned. Luck is not a factor. Thus in brass it is very dangerous to convert altars. You might convert an altar at experience level one and have to flee to another level from one minion, or three minions if the game rolled 0 twice, thus giving you no use of the converted altar. If converting an altar at experience level 7 or above, you might still get the pre-conversion minion, forcing you to fight as many as four summoned minions.[12]

Also, there seems to be a possibility in SLASH'EM to have equipment being worn blessed if you sacrifice enough.

See also

References