Potion of invisibility
! 
| |
|---|---|
| Name | invisibility |
| Appearance | random |
| Base price | 150 zm |
| Weight | 20 |
| Monster use | May be used by monsters as misc items. |
A potion of invisibility is a type of potion that appears in NetHack. The default randomized appearance associated with the potion is a "pink potion".[1]
Contents
Generation
Wizards may be given a potion of invisibility as any of the three random potions in their starting inventory.[2]
Potions of invisibility make up 1⁄25 (4%) of all potions randomly generated on the ground, in shops or as death drops. Liquor emporiums can also stock potions of invisibility.
Randomly generated intelligent monsters may receive a potion of invisibility as a miscellaneous item: if an invisibility item is chosen for the starting inventory of that monster, it has a 5⁄6 chance of receiving the potion, unless it is not hostile and the hero cannot currently see invisible.[3]
Description
Quaffing a potion of invisibility turns the drinker invisible and will auto-identify the potion if the effects are seen, with the effects varying depending on beatitude and whether the hero or a monster drank it.
A hero quaffing the blessed potion gains permanent invisibility, while an uncursed potion grants the hero temporary invisibility for 31-45 more turns.[4] A cursed potion has the same effect as an uncursed one but will also aggravate monsters, which awakens all sleeping and meditating monsters on the level and has a 1⁄5 chance of restoring mobility to immobile monsters.[5][6] The potion will have the same effects if the hero is blind, already invisible or else wearing a mummy wrapping, but does not auto-identify the potion and prints different messages.[7]
Monsters will seek out the potion and quaff it, unless they either possess a gaze attack and are not cancelled or else they are currently wearing a mummy wrapping.[8][9] A monster becomes permanently invisible if they quaff this potion or they are hit by a thrown or wielded potion, and if the hero sees them become invisible in either case, the potion is auto-identified and their position will be marked with a I.[10][11][12] If a monster quaffs a cursed potion, the hero is also "aggravated":[13] the invisible monster's position (marked with a I) will displayed on a blank map along with the hero's position, similar to a non-blessed potion of monster detection, and the hero is awakened from any unconscious state.[14][15] Peaceful and tame monsters that are not invisible will not quaff the potion if the hero cannot see invisible.
Inhaling the vapors from a broken potion of invisibility will cause the hero to become invisible very briefly, and auto-identifies the potion if they were not blind and were not already invisible.[16]
The following information pertains to an upcoming version (NetHack 3.7.0). If this version is now released, please verify that the information below is still accurate, then update the page to incorporate it.
Per commit f83a57c5, the quaffing effects for a hero are upgraded as follows:
- A hero quaffing a blessed potion has a 1⁄30 chance of becoming permanently invisible, which is reduced to 1⁄15 if they are currently invisible when quaffing the potion. Otherwise, the hero gains (3d100)+100 (more) turns of temporary invisibility.
- A hero quaffing an uncursed potion becomes invisible for (6d100)+100 (more) turns.
- A hero quaffing a cursed potion becomes invisible for (9d100)+100 (more) turns, and all sleeping and meditating monsters on the level are awakened as before.
Strategy
Uncursed potions of invisibility are useful for escaping or clearing out tricky combat situations early in the game, but will usually not be as reliable once a hero gets off the ground. A blessed potion is a quick and easy way to attain permanent invisibility, provided the hero also has a mummy wrapping or other means of handling shopping (or else is not concerned about it). A hero that is already permanently invisible or does not plan to become permanently invisible may consider non-cursed potions of invisibility a good candidate for dilution.
On the other hand, the potions are also worth keeping if the hero plans to curse them: quaffing the cursed potion of invisibility is useful for remotely waking up covetous monsters such as the quest nemesis, any of the demon lords and princes in Gehennom, or the Wizard of Yendor while within his Tower. This is best done while standing on the up stair, both to save the hero a trek across the level and reduce the number of fights prior to taking on the nemesis, as well as to block off their escape while fighting them.
History
The potion of invisibility first appears in Hack 1.21, Hack for PDP-11 and PC/IX Hack, which are all based on Jay Fenlason's Hack. It is included in the initial item list for Hack 1.0.
Messages
- For some reason, you feel your presence is known.
- This is additionally printed if you quaffed a cursed potion.
- You have a peculiar feeling for a moment, then it passes.
- You quaffed the potion while blind, already invisible, or else wearing a mummy wrapping.
- You have a normal feeling for a moment, then it passes.
- As above, while hallucinating.
- For some reason, <the monster's> presence is known to you.
- You feel aggravated at the invisible <monster>.
- A monster quaffed a cursed potion.
- Aggravated, you are jolted into full consciousness.
- As above, but the effect also roused you from unconsciousness.
- For an instant you couldn't see yourself!
- You inhaled the vapors of the potion while not blind.
- For an instant you could see right through yourself!
- As above, but you have see invisible.
Variants
SLASH'EM
In SLASH'EM, Flame Mages, Ice Mages, Necromancers, and Wizards may be given a potion of invisibility as any of the random potions in their starting inventories.[17][18][19][20]
Dipping an item in a potion of invisibility will turn it invisible.
Two potions of invisibility are placed randomly in the open area of Grund's Stronghold at level creation.
UnNetHack
In UnNetHack, the fake "throne room" in Asmodeus' Lair has a potion of invisibility placed in each of its four corners during level creation.
SpliceHack
In SpliceHack, the fake "throne room" in Asmodeus' Lair has a potion of invisibility placed in each of its four corners during level creation, similar to UnNetHack.
EvilHack
In EvilHack, agents are always generated with potions of invisibility.
SlashTHEM
In SlashTHEM, in addition to SLASH'EM details, the Ninja starts each game with a blessed potion of invisibility.
Making a potion of invisibility via chemistry set uses up three charges.
References
- ↑ src/objects.c in NetHack 3.6.7, line 794
- ↑ src/u_init.c in NetHack 3.6.7, line 166
- ↑ src/muse.c in NetHack 3.6.7, line 2035: peaceful monsters are not generated with invisibility items unless you can see them after use
- ↑ src/potion.c in NetHack 3.6.7, line 737-L752: potion effects
- ↑ src/potion.c in NetHack 3.6.7, line 748-L750: calls aggravate() in wizard.c
- ↑ src/wizard.c in NetHack 3.6.7, line 477: aggravate() function
- ↑ src/potion.c in NetHack 3.6.7, line 738-L739
- ↑ src/muse.c in NetHack 3.6.7, line 1723: monster usage of invisibility potions
- ↑ src/muse.c in NetHack 3.6.7, line 2057: monster seeking priority for invisibility potions
- ↑ src/potion.c in NetHack 3.6.7, line 1471: thrown potion hitting a monster
- ↑ src/muse.c in NetHack 3.6.7, line 1835-L1861: monster quaffing potion of invisibility
- ↑ src/muse.c in NetHack 3.6.7, line 1853: hero gains knowledge of the potion
- ↑ src/muse.c in NetHack 3.6.7, line 1856-L1860: monster quaffing cursed invisibility potion aggravates the hero
- ↑ src/muse.c in NetHack 3.6.7, line 1987
- ↑ src/muse.c in NetHack 3.6.7, line 2001
- ↑ src/potion.c in NetHack 3.6.7, line 1706
- ↑ u_init.c in SLASH'EM 0.0.7E7F2, line 66
- ↑ u_init.c in SLASH'EM 0.0.7E7F2, line 96
- ↑ u_init.c in SLASH'EM 0.0.7E7F2, line 137
- ↑ u_init.c in SLASH'EM 0.0.7E7F2, line 246
