Difference between revisions of "Invisibility"

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{{distinguish|invisible item (SLASH'EM)}}
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'''Invisibility''' is a [[property]] that prevents [[you]] from being seen by monsters that lack the [[see invisible]] property. Monsters with the invisibility property cannot be seen normally by a player without see invisible, though invisible monsters can be detected through other methods.
  
'''Invisibility''' is an [[intrinsic]] with the effect that monsters without [[see invisible]] cannot see you. If you are invisible, they will have difficulty locating you and will usually miss when attempting to attack you unless you stay in one place.
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==Effects==
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While invisible, the monster's glyph cannot be seen on the map unless the monster can be seen through another method, such as [[telepathy]]. If you bump into an invisible monster, their square will be marked with an {{white|I}}, and [[searching]] will also mark their locations this way; however, this is done before the monster takes action, meaning they will often move to another square afterward. Bumping into a [[peaceful]] invisible monster will anger it.
  
It is also an attribute of [[Invisibility#Monster_property|monsters the player cannot see]] (until acquiring the [[see invisible]] intrinsic). Invisibility has no effect on combat between monsters.
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While you are invisible, monsters will have difficulty locating you, and attacking monsters take a -2 to-hit penalty; such monsters will attack the square they think you are located on. Invisibility has no effect on combat between monsters.
  
==Advantages==
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An invisible player will be prevented from entering [[shop]]s by the [[shopkeeper]]. ("Invisible customers are not welcome!") The shopkeeper will also prevent invisible players from leaving.
=== Evasion ===
 
Because monsters cannot easily locate an invisible [[player]], an invisible player can fight an enemy that would otherwise be too powerful.
 
  
=== Melee ===
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===Effects on other objects and properties===
While the player is invisible, monsters incur a -2 to-hit penalty, and may strike at where they think you are rather than where you are.
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Invisibility prevents [[displacement]] from working on monsters that do not see invisible. You also cannot scare monsters by [[apply]]ing a [[mirror]] unless they can see invisible; similarly, mirrors and sources of [[reflection]] will not reflect [[Medusa]]'s petrifying [[gaze]] while you are invisible.
  
=== Unicorns ===
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While invisible, wearing a [[mummy wrapping]] will render you visible until it is taken off.
A [[unicorn]] will not teleport away from an invisible player. Thus an invisible player may approach a coaligned unicorn and offer it a [[gem]].
 
  
=== Stalkers ===
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==Sources==
Eating a [[stalker]] corpse while invisible will grant you see-invisible and make you permanently invisible.
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There are multiple methods of becoming invisible:
  
== Disadvantages ==
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* You can become invisible by [[quaff]]ing a [[potion of invisibility]], zapping a [[wand of make invisible]] at yourself, or wearing a [[cloak of invisibility]]; monsters can also do the same, and the potion effect is always permanent for monsters. You can also wear ([[Eating jewelry|or eat]]) a [[ring of invisibility]], which will [[auto-identify]] itself when you put it on unless you have invisibility from another source. Except for non-[[blessed]] potions, these items will make you invisible either permanently or until you remove them.
  
=== Shop entry ===
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* The {{spellbook of|invisibility}} spell and non-blessed potions of invisibility will grant you temporary invisibility for 31-45 (more) turns.
{{main|Shop#Methods_of_entering.2Fleaving_when_invisible}}
 
An invisible [[player]] will be prevented from entering [[shop]]s by the [[shopkeeper]] ("Invisible customers are not welcome!").  This can be circumvented by wearing a [[mummy wrapping]], which will render you visible while you are wearing it, or by teleporting past the shopkeeper.
 
  
=== Monster control ===
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* The [[Orb of Detection]], the [[Archeologist]] [[quest artifact]], can be #[[invoked]] to toggle invisibility on or off if you do not already have the property.
It is more difficult to get monsters that don't have [[see invisible]] to follow you, which may be a desired effect depending on the circumstances. Example: While invisible, it is harder to lure [[soldier|soldiers]] into the [[Castle]] [[trap|trapdoors]] because soldiers cannot see invisible, or to lure [[wraith]]s to a non-[[graveyard]] level.
 
  
=== Unicorns ===
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* Eating [[stalker]] meat will stun you and turn you invisible for 50-149 (more) turns; if you are already invisible through other means, you will instead gain permanent invisibility and the see invisible intrinsic. Pets cannot gain invisibility from eating stalkers.
Normally a [[unicorn]] will avoid contact with the player, but this only works if the player is visible.  A hostile unicorn will easily approach an invisible player, and attack.
 
  
=== Medusa and mirror ===
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Monsters will make use of the wand and the potion, which is always permanent for them, and the [[disappear]] [[monster spell|monster mage spell]] renders its caster invisible. Tame and peaceful monsters will only use these if you can ''currently'' [[see invisible]]. Stalkers and [[black light]]s are always generated invisible.
  
If you are invisible, having reflection or applying mirror is inefficient against Medusa.  
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==Strategy==
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Invisibility has a number of perks for especially crafty players. Pets gain no benefits from being invisible, as it does not affect monster-versus-monster combat, and will only make them harder to keep track of.
  
Being invisible, you cannot scare any monsters by applying mirror, unless they can [[see invisible]].
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Tame and peaceful monsters that have a way to turn invisible, including spellcasters, only do so if you have see invisible; this is particularly dangerous if you got the property from drinking a non-blessed [[potion of see invisible]], as you will not be able to see them once it expires. Bumping into invisible monsters will anger them - this is potentially fatal in the case of the [[watch]] and shopkeepers.
  
== How to acquire ==
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===Fighting while invisible===
Ways to gain this intrinsic permanently or indefinitely:
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Invisibility is a good evasive aid, usually resulting in hostile attackers missing more often unless you stay in one place; it is especially useful in the early game, where few monsters will have see invisible, and can aid in escape from unexpectedly powerful foes. This can also double as an offensive aid that helps you keep targets off-balance while picking them off from a distance, e.g., with [[projectile]]s or [[polearms]]. As the game progresses, you will encounter more monsters with see invisible, limiting its effectiveness (unless paired with something like displacement).
  
* Eat [[stalker]] meat (corpse or tin) while already invisible through some other means. This method also grants you the [[see invisible]] intrinsic.
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Since its passive gaze relies on ''you'' seeing it, a [[floating eye]] is not affected by a player's invisibility; however, turning the eye invisible instead will render the gaze ineffective (unless you have see invisible), rendering it harmless and allowing you to attack it with impunity. Invisible floating eyes will also not paralyze pets that cannot see invisible; this is especially useful for [[pacifist]]s.
  
* Zap yourself with a [[wand of make invisible]].
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Invisibility can actually be a disadvantage in certain scenarios: [[unicorn]]s in particular cannot see invisible and will not know the player's location to keep a knight's jump away, meaning that hostile unicorns will close in unexpectedly and likely skewer an early character. Conversely, invisible players can safely approach co-aligned unicorns to throw their [[gems]] at, and cross-aligned ones will be easier to kill or pacify for a prepared character. Invisibility can also make controlling other monsters for various purposes difficult if they lack see invisible, e.g., luring [[soldier]]s into [[Castle]] [[trap door]]s or luring [[wraith]]s away from non-[[graveyard]] levels.  
  
* Quaff a blessed [[potion of invisibility]].
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The mummy wrapping is a good cloak for players who elects to remain invisible long-term, but find it necessary to become temporarily visible for certain tasks. Like any other piece of armor, be sure to verify the [[beatitude]] of a wrapping before trying it on. If you temporarily remove another cloak to use a wrapping, make sure to replace the cloak once you're done.
  
* Put on (or [[eating jewelry|eat]]) a [[ring of invisibility]].
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===Fighting invisible monsters===
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Invisible monsters can be annoying to deal with, and are especially aggravating if the base monster was already decently strong (e.g., a stalker). Searching can reveal their approximate location and help you take the fight to them, and you can also lure the monster down a narrow hallway to make it easier to target; monsters that drink cursed potions of invisibility will also "aggravate" you, revealing their location to you temporarily and allowing you to plan accordingly.
  
* Put on a [[cloak of invisibility]].
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Pets are not deterred by invisibility and can pick a monster off as it approaches; if the monster is a black light, however, it will likely explode and [[confuse]] them, causing them to potentially attack you in turn. [[Shapeshifter]]s that turn into powerful enough spellcasting monsters can cast disappear, and will retain their invisibility even after they shift forms again.
  
* Invoke the [[Orb of Detection]]. Note: toggles invisibility unless it is already acquired as an intrinsic.
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Monsters can generate with a wand of make invisible as a [[miscellaneous item]]; if you recently heard a zap prior to killing an invisible monster, and the monster drops a wand that makes engravings vanish, it is most likely a wand of make invisible.
  
Temporary invisibility, 31 to 45 turns (more):
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===Invisibility and shops===
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One of the main disadvantages to invisibility is the hassle of shopping - you will be barred from entering or leaving unless you make yourself visible, which is especially troublesome if the source is a cursed item or gave invisibility that was permanent. Most players should keep a mummy wrapping or two on hand in case they accidentally wear such a cursed item and cannot remove it, obtain invisibility that cannot be toggled, or else simply plan to shop while invisible; they can also try to [[teleport]] into and out of the shop.
  
* Quaff a non-blessed [[potion of invisibility]].
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==Variants==
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===SLASH'EM===
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In [[SLASH'EM]]
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====Invisible items====
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{{main|Invisible item (SLASH'EM)}}
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Items can also be invisible as well - this includes the [[corpse]]s of killed invisible monsters, but not any [[statue]]s created from [[stoning]] them. Zapping an item(s) with a wand of make invisible will turn it invisible, as will dipping them in a potion of invisibility; dipping the item in a potion of see invisible or [[cancelling]] it will render it visible again. There is a {{frac|1250}} chance that a randomly generated item will be created invisible.<ref>{{sourcecode|mkobj.c|683|version=SLASH'EM 0.0.7E7F2}}</ref>
  
* Cast the {{Spell of|invisibility}} spell on yourself.
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The [[wand of wishing]] in the Castle is always invisible, but will always be found within its [[chest]] under normal circumstances. Mummy wrappings and [[zorkmids]] can never be made invisible, and Sokoban [[boulder]]s cannot generate invisible.<ref>{{sourcecode|obj.h|145|version=SLASH'EM 0.0.7E7F2}}</ref>
  
== Ways to manage this intrinsic ==
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Invisible items mostly function the same as their visible counterparts, with some exceptions:
If you want to enter a shop, or for some other reason become visible, the easiest way is to find a [[mummy wrapping]] ([[mummy|mummies]] drop wrappings at a high rate) and wear it, which renders you visible (think "The Invisible Man"). The only two caveats are:
 
  
* The mummy wrapping counts as a cloak in terms of the slot that it takes up. If you have a reason to wear another type of [[cloak]] (such as a [[cloak of magic resistance]] to defend yourself against magic [[traps]] and other magical dangers), be careful when and where you wear the mummy wrapping. However, since the main reason to wear a mummy wrapping is to enter [[shop|shops]], and there are no traps in shops, this isn't a huge obstacle. Just be careful you don't forget to change back when you're finished shopping!
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* An invisible [[blindfold]] or [[towel]] will still blind you if worn.
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* An invisible mirror will not function when applied unless the monster has see invisible.
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* Invisible scrolls and books cannot be [[read]] if you cannot see invisible. <!-- The same constraint doesn't appear to exist for monsters, but it doesn't make a big difference as they can't pick up invisible scrolls, only be generated with them -->
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* An invisible weapon has a +3 to-hit bonus against monsters that cannot see invisible.
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* Invisible items cannot be stolen by a monster that cannot see invisible, with the exception of invisible body armor or a cloak worn on top of a visible [[t-shirt]] or body armor; no monster with a theft attack can normally see invisible.<ref>{{sourcecode|steal.c|277|version=SLASH'EM 0.0.7E7F2}}</ref>
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* The [[disarm (technique)|disarm technique]] cannot be used if you cannot see the target's weapon.
  
* Lastly, just like any other item in the dungeon, a mummy wrapping can be generated blessed, cursed, or uncursed, and have an enchantment level. Take caution and check the [[BUC]] status of the wrapping before wearing it, or you might be wasting your cloak spot, raising your [[armor class]], and rendering yourself visible out of carelessness. Mummy wrappings are affected by [[scroll of enchant armor|scrolls of enchant armor]] and [[scroll of destroy armor|scrolls of destroy armor]] just like any other piece of [[armor]].
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Monsters will not pick up invisible objects if they cannot see invisible;<ref>{{sourcecode|mon.c|1025|version=SLASH'EM 0.0.7E7F2}}</ref> however, this does not prevent them from moving to the item, with the result that they stand on top of it trying and failing to pick it up repeatedly.
  
==Monster property==
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==References==
Monsters can also be permanently made invisible by the [[wand of make invisible|wand]], [[potion of invisibility|potion]], [[Disappear|mage monster spell]], or by being a [[stalker]] or [[black light]]. Hostile monsters will use [[miscellaneous item|these items]] readily (regardless of [[BUC]] status) and have a chance of being generated with them. Peaceful and tame ones only do so if you can [[see invisible]]; this can be a problem if the [[potion of see invisible|potion]] only lets you temporarily see invisible.
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<references/>
 
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{{nethack-366}}
There is no benefit to making [[pet]]s invisible since it does not affect inter-monster combat. As an exception, an invisible [[floating eye]]'s [[gaze]] will not paralyze pets that cannot see invisible; this is useful for [[pacifist]]s.
 
 
 
If you recently heard a zap and find a wand that makes engravings vanish on a fresh kill, then the wand is most likely [[wand of make invisible|make invisible]].
 
 
 
==SLASH'EM==
 
 
 
In SLASH'EM, the corpses of invisible monsters are also invisible
 
 
 
"You feel here an invisible <monster> corpse."
 
 
 
{{nethack-343}}
 
 
[[Category:Properties]]
 
[[Category:Properties]]

Latest revision as of 05:17, 14 June 2021

Invisibility is a property that prevents you from being seen by monsters that lack the see invisible property. Monsters with the invisibility property cannot be seen normally by a player without see invisible, though invisible monsters can be detected through other methods.

Effects

While invisible, the monster's glyph cannot be seen on the map unless the monster can be seen through another method, such as telepathy. If you bump into an invisible monster, their square will be marked with an I, and searching will also mark their locations this way; however, this is done before the monster takes action, meaning they will often move to another square afterward. Bumping into a peaceful invisible monster will anger it.

While you are invisible, monsters will have difficulty locating you, and attacking monsters take a -2 to-hit penalty; such monsters will attack the square they think you are located on. Invisibility has no effect on combat between monsters.

An invisible player will be prevented from entering shops by the shopkeeper. ("Invisible customers are not welcome!") The shopkeeper will also prevent invisible players from leaving.

Effects on other objects and properties

Invisibility prevents displacement from working on monsters that do not see invisible. You also cannot scare monsters by applying a mirror unless they can see invisible; similarly, mirrors and sources of reflection will not reflect Medusa's petrifying gaze while you are invisible.

While invisible, wearing a mummy wrapping will render you visible until it is taken off.

Sources

There are multiple methods of becoming invisible:

  • The invisibility spell and non-blessed potions of invisibility will grant you temporary invisibility for 31-45 (more) turns.
  • Eating stalker meat will stun you and turn you invisible for 50-149 (more) turns; if you are already invisible through other means, you will instead gain permanent invisibility and the see invisible intrinsic. Pets cannot gain invisibility from eating stalkers.

Monsters will make use of the wand and the potion, which is always permanent for them, and the disappear monster mage spell renders its caster invisible. Tame and peaceful monsters will only use these if you can currently see invisible. Stalkers and black lights are always generated invisible.

Strategy

Invisibility has a number of perks for especially crafty players. Pets gain no benefits from being invisible, as it does not affect monster-versus-monster combat, and will only make them harder to keep track of.

Tame and peaceful monsters that have a way to turn invisible, including spellcasters, only do so if you have see invisible; this is particularly dangerous if you got the property from drinking a non-blessed potion of see invisible, as you will not be able to see them once it expires. Bumping into invisible monsters will anger them - this is potentially fatal in the case of the watch and shopkeepers.

Fighting while invisible

Invisibility is a good evasive aid, usually resulting in hostile attackers missing more often unless you stay in one place; it is especially useful in the early game, where few monsters will have see invisible, and can aid in escape from unexpectedly powerful foes. This can also double as an offensive aid that helps you keep targets off-balance while picking them off from a distance, e.g., with projectiles or polearms. As the game progresses, you will encounter more monsters with see invisible, limiting its effectiveness (unless paired with something like displacement).

Since its passive gaze relies on you seeing it, a floating eye is not affected by a player's invisibility; however, turning the eye invisible instead will render the gaze ineffective (unless you have see invisible), rendering it harmless and allowing you to attack it with impunity. Invisible floating eyes will also not paralyze pets that cannot see invisible; this is especially useful for pacifists.

Invisibility can actually be a disadvantage in certain scenarios: unicorns in particular cannot see invisible and will not know the player's location to keep a knight's jump away, meaning that hostile unicorns will close in unexpectedly and likely skewer an early character. Conversely, invisible players can safely approach co-aligned unicorns to throw their gems at, and cross-aligned ones will be easier to kill or pacify for a prepared character. Invisibility can also make controlling other monsters for various purposes difficult if they lack see invisible, e.g., luring soldiers into Castle trap doors or luring wraiths away from non-graveyard levels.

The mummy wrapping is a good cloak for players who elects to remain invisible long-term, but find it necessary to become temporarily visible for certain tasks. Like any other piece of armor, be sure to verify the beatitude of a wrapping before trying it on. If you temporarily remove another cloak to use a wrapping, make sure to replace the cloak once you're done.

Fighting invisible monsters

Invisible monsters can be annoying to deal with, and are especially aggravating if the base monster was already decently strong (e.g., a stalker). Searching can reveal their approximate location and help you take the fight to them, and you can also lure the monster down a narrow hallway to make it easier to target; monsters that drink cursed potions of invisibility will also "aggravate" you, revealing their location to you temporarily and allowing you to plan accordingly.

Pets are not deterred by invisibility and can pick a monster off as it approaches; if the monster is a black light, however, it will likely explode and confuse them, causing them to potentially attack you in turn. Shapeshifters that turn into powerful enough spellcasting monsters can cast disappear, and will retain their invisibility even after they shift forms again.

Monsters can generate with a wand of make invisible as a miscellaneous item; if you recently heard a zap prior to killing an invisible monster, and the monster drops a wand that makes engravings vanish, it is most likely a wand of make invisible.

Invisibility and shops

One of the main disadvantages to invisibility is the hassle of shopping - you will be barred from entering or leaving unless you make yourself visible, which is especially troublesome if the source is a cursed item or gave invisibility that was permanent. Most players should keep a mummy wrapping or two on hand in case they accidentally wear such a cursed item and cannot remove it, obtain invisibility that cannot be toggled, or else simply plan to shop while invisible; they can also try to teleport into and out of the shop.

Variants

SLASH'EM

In SLASH'EM

Invisible items

Items can also be invisible as well - this includes the corpses of killed invisible monsters, but not any statues created from stoning them. Zapping an item(s) with a wand of make invisible will turn it invisible, as will dipping them in a potion of invisibility; dipping the item in a potion of see invisible or cancelling it will render it visible again. There is a 11250 chance that a randomly generated item will be created invisible.[1]

The wand of wishing in the Castle is always invisible, but will always be found within its chest under normal circumstances. Mummy wrappings and zorkmids can never be made invisible, and Sokoban boulders cannot generate invisible.[2]

Invisible items mostly function the same as their visible counterparts, with some exceptions:

  • An invisible blindfold or towel will still blind you if worn.
  • An invisible mirror will not function when applied unless the monster has see invisible.
  • Invisible scrolls and books cannot be read if you cannot see invisible.
  • An invisible weapon has a +3 to-hit bonus against monsters that cannot see invisible.
  • Invisible items cannot be stolen by a monster that cannot see invisible, with the exception of invisible body armor or a cloak worn on top of a visible t-shirt or body armor; no monster with a theft attack can normally see invisible.[3]
  • The disarm technique cannot be used if you cannot see the target's weapon.

Monsters will not pick up invisible objects if they cannot see invisible;[4] however, this does not prevent them from moving to the item, with the result that they stand on top of it trying and failing to pick it up repeatedly.

References