Difference between revisions of "Half spell damage"

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m (potholes et. al.)
(Delete oodles of redundant information, such as a list of every spellcasting monster. Add several missing facts. (Looks like the 3.6 tag was pro forma). Address the TODO. Verify all the facts against 3.6.7. Update references from 3.4.3 to 3.6.7.)
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'''Half spell damage''' is an [[extrinsic]] [[property]] that occurs in ''[[NetHack]]'', and halves any [[damage]] taken from spells while reducing the impact of certain other spell effects.
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{{tocright}}
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'''Half spell damage''' is an [[extrinsic]] [[property]] that occurs in ''[[NetHack]]'', and reduces [[damage]] taken from certain magical attacks and effects.
  
 
This property is conferred by carrying [[the Orb of Detection]], [[the Platinum Yendorian Express Card]], [[the Orb of Fate]] or [[the Eye of the Aethiopica]]. Carrying more than one of these objects does not further affect spell damage.
 
This property is conferred by carrying [[the Orb of Detection]], [[the Platinum Yendorian Express Card]], [[the Orb of Fate]] or [[the Eye of the Aethiopica]]. Carrying more than one of these objects does not further affect spell damage.
  
 
==Description==
 
==Description==
−
Half spell damage reduces any damage inflicted from spells by 50%.
 
−
{{todo|Also appears to affect damage from wands zapped by monsters? (see {{function|zap.c|zhitu|x}})}}
 
−
 
−
===Affected monster spells===
 
−
{{main|Monster spells}}
 
−
 
−
The following monster spells are affected by half spell damage:
 
−
 
−
{|class="prettytable striped sortable"
 
−
!Spell
 
−
!Spell type
 
−
!Min. level
 
−
!Effect
 
−
|-
 
−
|[[Psi bolt]]
 
−
|Magical
 
−
|1
 
−
|Halves damage.{{refsrc|mcastu.c|264|comment=Half spell damage initially applies to all spells; this matters for spells which don't do their own damage calculations|name=initial half damage}} Stacks with magic resistance to quarter damage.{{refsrc|mcastu.c|456}}
 
−
|-
 
−
|[[Stun (monster spell)|Stun]]
 
−
|Magical
 
−
|4
 
−
|Halves duration.{{refsrc|mcastu.c|434}} However, this is trivial with a unicorn horn.
 
−
|-
 
−
|[[Drain strength]]
 
−
|Magical
 
−
|7
 
−
|Halves reduction.{{refsrc|mcastu.c|408}} However, magic resistance negates.{{refsrc|mcastu.c|402}}
 
−
|-
 
−
|[[Curse items]]
 
−
|Magical
 
−
|11
 
−
|Halves number of items affected from 1d6 to 1d3.{{refsrc|sit.c|337|name=curse items}} Stacks with magic resistance, to only 1d2.<ref name='curse items'/>
 
−
|-
 
−
|[[Open wounds]]
 
−
|Clerical
 
−
|1
 
−
|Halves damage.<ref name='initial half damage'/> Stacks with magic resistance to quarter damage.{{refsrc|mcastu.c|641}}
 
−
|-
 
−
|[[Confuse (monster spell)|Confuse]]
 
−
|Clerical
 
−
|3
 
−
|Halves duration.{{refsrc|mcastu.c|621}} However, this is trivial with a unicorn horn.
 
−
|-
 
−
|[[Paralyze (monster spell)|Paralyze]]
 
−
|Clerical
 
−
|5
 
−
|Halves duration.{{refsrc|mcastu.c|608}} However, magic resistance or free action reduces to 1 turn instead.{{refsrc|mcastu.c|599}}
 
−
|-
 
−
|[[Blind (monster spell)|Blind]]
 
−
|Clerical
 
−
|6
 
−
|Halves duration.{{refsrc|mcastu.c|592}} However, this is trivial with a unicorn horn or [[the Eyes of the Overworld]].
 
−
|-
 
−
|[[Lightning (monster spell)|Lightning]]
 
−
|Clerical
 
−
|12
 
−
|Halves damage.{{refsrc|mcastu.c|525}} However, shock resistance negates.{{refsrc|mcastu.c|518}}
 
−
|-
 
−
|[[Fire pillar]]
 
−
|Clerical
 
−
|13
 
−
|Halves damage.{{refsrc|mcastu.c|504}} However, fire resistance negates.{{refsrc|mcastu.c|499}}
 
−
|-
 
−
|[[Asmodeus#Magical cold attack|Cold]]
 
−
|[[Asmodeus]] only
 
−
|
 
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|Halves damage.<ref name='initial half damage'/> However, cold resistance negates.{{refsrc|mcastu.c|281}}
 
−
|-
 
−
|Psychic blast
 
−
|[[Mind flayer]], master mind flayer
 
−
|
 
−
|Halves damage.{{refsrc|monmove.c|427}}
 
−
|}
 
  
−
If the player has all [[resistance]]s (including [[magic resistance]]) and a [[noncursed]] [[unicorn horn]], the only spells usefully affected by half spell damage are [[psi bolt]], [[open wounds]], [[curse items]], and [[mind flayer]]s' psychic blasts.
+
Half spell damage reduces hit point damage from many [[monster spells]]{{refsrc|nethack=3.6.7|src/mcastu.c|292|comment=function mcastu}}, [[ray]] attacks (but not [[breath]] attacks),{{refsrc|nethack=3.6.7|src/zap.c|3892|comment=20 to 29 and -20 to -29 are breath types}}, other magical attacks, and a few magical effects that are not attacks.
  
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==== Monsters affected ====
+
{|class="wikitable"
−
The following monsters can cast spells, some of which are affected by half spell damage as detailed above:
+
! Attack or Effect
−
{|class="prettytable striped sortable"
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! Type
−
! style="text-align: left"| Monster
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! Effect
−
! style="text-align: left"| Base level
 
−
! Spell type
 
−
! Notes
 
 
|-
 
|-
−
|{{monsymlink|kobold shaman}}
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| [[Psi bolt]] || [[Monster spell#Mage spells|monster mage spell]] || Halves damages. Stacks with magic resistance to quarter damage.
−
|2
 
−
| Magical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|orc shaman}}
+
| [[Stun (monster spell)]] || [[Monster spell#Mage spells|monster mage spell]] || Halves duration.
−
| 3
 
−
| Magical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|gnomish wizard}}
+
| [[Drain strength]] || [[Monster spell#Mage spells|monster mage spell]] || Halves strength reduction.
−
| 3
 
−
| Magical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|barrow wight}}
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| [[Open wounds]] || [[Monster spell#Clerical spells|monster clerical spell]] || Halves damage. Stacks with magic resistance to quarter damage.
−
| 3
 
−
| Magical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|guide}}
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| [[Confuse (monster spell)]] || [[Monster spell#Clerical spells|monster clerical spell]] || Halves duration.
−
| 5
 
−
| Magical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|abbot}}
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| [[Paralyze (monster spell)]] || [[Monster spell#Clerical spells|monster clerical spell]] || Halves duation.
−
|5
 
−
|Clerical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|acolyte}}
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| [[Blind (monster spell)]] || [[Monster spell#Clerical spells|monster clerical spell]] || Halves duration.
−
|5
 
−
|Clerical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|apprentice}}
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| [[Lightning (monster spell)]] || [[Monster spell#Clerical spells|monster clerical spell]] || Halves damage.
−
| 5
 
−
| Magical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|mind flayer}}
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| [[Fire pillar]] || [[Monster spell#Clerical spells|monster clerical spell]] || Halves damage.
−
| 9
 
−
| Psychic blast
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|golden naga}}
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| [[Ray]] || any ray (but not breath) || Halves damage.
−
| 10
 
−
| Magical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|nalfeshnee}}
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| Magical cold attack || such as that of [[Asmodeus]] || Halves damage.{{refsrc|nethack=3.6.7|src/mcastu.c|292}}
−
| 11
 
−
| Magical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|lich}}
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| [[Mind blast]] || Monster special ability || Halves damage.{{refsrc|nethack=3.6.7|src/monmove.c|517}}
−
| 11
 
−
| Magical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|aligned priest}}
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| [[Wand of striking]] || zapped by a monster || Halves damage.{{refsrc|nethack=3.6.7|src/muse.c|1257}}
−
|12
 
−
|Clerical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|master mind flayer}}
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| [[Scroll of fire]] || read by a monster || Halves damage.{{refsrc|nethack=3.6.7|src/muse.c|1519}}
−
|13
 
−
|Psychic blast
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|demilich}}
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| [[Curse items]] || [[monster spell]], [[throne]] effect, [[Wizard of Yendor#Harassment|harassment effect]] || Reduces number of items cursed.{{refsrc|nethack=3.6.7|src/sit.c|356|comment=function rndcurse}}
−
| 14
 
−
| Magical
 
−
|
 
 
|-
 
|-
−
|{{monsymlink|Dark One}}
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| [[Antimagic trap]] || triggered by hero || If hero has [[magic resistance]], ''increases'' hit point damage by 1d4.{{refsrc|nethack=3.6.7|src/trap.c|1429}}
−
| 15
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|Ixoth}}
 
−
| 15
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|Minion of Huhetotl}}
 
−
| 16
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|Thoth Amon}}
 
−
| 16
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|Chromatic Dragon}}
 
−
| 16
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|Nalzok}}
 
−
| 16
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|ki-rin}}
 
−
| 16
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|titan}}
 
−
| 16
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|master lich}}
 
−
| 17
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|Archon}}
 
−
|19
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|Neferet the Green}}
 
−
|20
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|arch-lich}}
 
−
|25
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|Grand Master}}
 
−
|25
 
−
|Clerical
 
−
|
 
−
|-
 
−
|{{monsymlink|high priest}}
 
−
|25
 
−
|Clerical
 
−
|
 
−
|-
 
−
|{{monsymlink|Arch Priest}}
 
−
|25
 
−
|Clerical
 
−
|
 
−
|-
 
−
|{{monsymlink|Master Kaen}}
 
−
|25
 
−
|Clerical
 
−
|
 
−
|-
 
−
|{{monsymlink|Wizard of Yendor}}
 
−
|30
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|Orcus}}
 
−
|30
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|Dispater}}
 
−
|36
 
−
| Magical
 
−
|
 
−
|-
 
−
|{{monsymlink|Asmodeus}}
 
−
|49
 
−
|
 
−
| Has a unique magical cold attack.
 
−
|-
 
−
|{{monsymlink|Demogorgon}}
 
−
|50
 
−
| Magical
 
−
|
 
 
|}
 
|}
  
−
===Exceptions===
+
Half spell damage does not reduce damage from:
−
The following sources of damage, though they may be considered spells, are not affected by half spell damage:
+
* Magic missile attacks such as those of [[Angel]]s{{refsrc|nethack=3.6.7|src/mcastu.c|315|comment=case AD_MAGM recalculates damage after half spell damage was applied}}
−
*The [[magic missile]] attack from [[angel]]s, [[Yeenoghu]], [[gray dragon]]s and the [[Chromatic Dragon]].
+
* The [[geyser]] monster clerical spell
−
*[[Oracle (monster)|The Oracle's]] [[passive]] magic missile attack.{{refsrc|uhitm.c|2228}}
+
* [[breath]] attacks
−
*The [[geyser]] monster spell, which is considered physical damage.{{refsrc|mcastu.c|495}}
+
 
−
*Any spells cast or wands zapped by the player.{{refsrc|zap.c|3185}}{{refsrc|zap.c|3265}}
+
== Strategy ==
 +
 
 +
Many magical attacks and effects are already defended by the [[resistance]]s available from crowning (plus [[magic resistance]]), or easily fixed with a [[noncursed]] [[unicorn horn]]. Those which are not are:
 +
* Monster spells: [[psi bolt]], [[open wounds]], and [[curse items]]
 +
* [[Mind blast]] attacks
 +
* Item cursing effect from [[Wizard of Yendor#harassment|harassment]]
  
 
==Variants==
 
==Variants==
Line 286: Line 68:
 
==References==
 
==References==
 
<references/>
 
<references/>
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{{stub}}
 
 
{{nethack-367}}
 
{{nethack-367}}

Revision as of 03:34, 6 July 2024

Half spell damage is an extrinsic property that occurs in NetHack, and reduces damage taken from certain magical attacks and effects.

This property is conferred by carrying the Orb of Detection, the Platinum Yendorian Express Card, the Orb of Fate or the Eye of the Aethiopica. Carrying more than one of these objects does not further affect spell damage.

Description

Half spell damage reduces hit point damage from many monster spells[1], ray attacks (but not breath attacks),[2], other magical attacks, and a few magical effects that are not attacks.

Attack or Effect Type Effect
Psi bolt monster mage spell Halves damages. Stacks with magic resistance to quarter damage.
Stun (monster spell) monster mage spell Halves duration.
Drain strength monster mage spell Halves strength reduction.
Open wounds monster clerical spell Halves damage. Stacks with magic resistance to quarter damage.
Confuse (monster spell) monster clerical spell Halves duration.
Paralyze (monster spell) monster clerical spell Halves duation.
Blind (monster spell) monster clerical spell Halves duration.
Lightning (monster spell) monster clerical spell Halves damage.
Fire pillar monster clerical spell Halves damage.
Ray any ray (but not breath) Halves damage.
Magical cold attack such as that of Asmodeus Halves damage.[3]
Mind blast Monster special ability Halves damage.[4]
Wand of striking zapped by a monster Halves damage.[5]
Scroll of fire read by a monster Halves damage.[6]
Curse items monster spell, throne effect, harassment effect Reduces number of items cursed.[7]
Antimagic trap triggered by hero If hero has magic resistance, increases hit point damage by 1d4.[8]

Half spell damage does not reduce damage from:

Strategy

Many magical attacks and effects are already defended by the resistances available from crowning (plus magic resistance), or easily fixed with a noncursed unicorn horn. Those which are not are:

Variants

SLASH'EM

In SLASH'EM, the Yeoman quest artifact, the Crown of Saint Edward, also confers half spell damage.

See also

References

  1. ↑ src/mcastu.c in NetHack 3.6.7, line 292: function mcastu
  2. ↑ src/zap.c in NetHack 3.6.7, line 3892: 20 to 29 and -20 to -29 are breath types
  3. ↑ src/mcastu.c in NetHack 3.6.7, line 292
  4. ↑ src/monmove.c in NetHack 3.6.7, line 517
  5. ↑ src/muse.c in NetHack 3.6.7, line 1257
  6. ↑ src/muse.c in NetHack 3.6.7, line 1519
  7. ↑ src/sit.c in NetHack 3.6.7, line 356: function rndcurse
  8. ↑ src/trap.c in NetHack 3.6.7, line 1429
  9. ↑ src/mcastu.c in NetHack 3.6.7, line 315: case AD_MAGM recalculates damage after half spell damage was applied
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