Potion of clairvoyance - Revision history

Cherokee Jack: Can't find any indication in source code that cornuthaums affect this form of clairvoyance

2015-06-19T15:50:32Z

Can't find any indication in source code that cornuthaums affect this form of clairvoyance

Cherokee Jack: Added references to SLASH'EM source, cursed effect, and hallucinatory message

2015-06-19T15:41:58Z

Added references to SLASH'EM source, cursed effect, and hallucinatory message

Cherokee Jack: Saw this on the list of "Wanted pages"; used "potion of ESP" as template

2015-06-17T15:33:39Z

Saw this on the list of "Wanted pages"; used "potion of ESP" as template

New page

{{potion
|name=Clairvoyance|fullcost=100
}}

A '''potion of clairvoyance''' is a [[SLASH'EM]]-specific [[potion]]. If [[uncursed]], it grants a single application of [[clairvoyance]], revealing all corridors, walls, and [[stairs]] in a 19x11 region around [[you]]. Like [[Scroll of magic mapping|magic mapping]], this does not reveal [[secret door]]s, [[traps]], or [[objects]]. Unlike magic mapping, however, this works even if the level is designated [[Scroll of magic mapping|non-mappable]].

If [[blessed]], the potion grants 100-149 turns of [[intrinsic]] [[clairvoyance]], which gives you a 50% chance of mapping the surrounding 19x11 area every 15 turns. This is the same property that can be acquired from [[Aligned priest#Chatting, e.g. for protection|donating]] 200 to 400 times your [[experience level]] to an [[aligned priest]], but for a shorter duration than the 500-999 turns received from donating.

== Strategy ==

In a contest between the new-to-[[SLASH'EM]] potion of clairvoyance and the existing scroll of magic mapping, magic mapping wins out in most categories. The clairvoyance effect provided by the potion reveals the same tiles as magic mapping, but only in a small fraction of the map, centered on the player. Intrinsic clairvoyance from the blessed potion potentially increases the area that can be mapped, if the player is moving constantly to cover new area for the duration of the potion's effects (which the layout of the level, or [[Trap|its]] [[Monster (SLASH'EM)|contents]], may not permit), and does not fail the 50% roll every 15 turns. Even so, an uncursed scroll of magic mapping (or [[Spellbook of magic mapping|the spell]]) can still reveal the entire level in one turn, and in [[SLASH'EM]] a blessed scroll detects objects as well, saving the player a [[potion of object detection]] to boot. And scrolls [[weight|weigh]] 1/4 as much as potions, making a stack of scrolls of magic mapping a better choice for one's [[ascension kit|kit]].

At best a potion of clairvoyance can save the player a few turns [[searching]] for [[secret passage]]s when he/she has no form of magic mapping or is on a non-mappable level where attempting magic mapping would [[Confusion|confuse]] [[you]] ("Your mind is filled with crazy lines!"). Most non-mappable levels in SLASH'EM have preset layouts, but the potion may be useful if the player is unfamiliar with the layout and does not wish to consult a map.

Otherwise players may wish to pass up potions of clairvoyance, or save them for [[dilution]] for [[water prayer]].

== References ==
<references />

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-A '''potion of clairvoyance''' is a [[SLASH'EM]]-specific [[potion]]. If [[uncursed]], it grants a single application of [[clairvoyance]], revealing all corridors, walls, and [[stairs]] in a 19x11 region around [[you]] <ref>{{sourcecode|potion.c|779|version=SLASH'EM 0.0.7E7F2}}</ref>. Like [[Scroll of magic mapping|magic mapping]], this does not reveal [[secret door]]s, [[traps]], or [[objects]]. Unlike magic mapping, however, this works even if the level is designated [[Scroll of magic mapping|non-mappable]].
+A '''potion of clairvoyance''' is a [[SLASH'EM]]-specific [[potion]]. If [[uncursed]], it grants a single application of [[clairvoyance]], revealing all corridors, walls, and [[stairs]] in a 19x11 region around [[you]] <ref>{{sourcecode|potion.c|779|version=SLASH'EM 0.0.7E7F2}}</ref>. Like [[Scroll of magic mapping|magic mapping]], this does not reveal [[secret door]]s, [[traps]], or [[objects]]. Unlike magic mapping, however, this works even if the level is designated [[Scroll of magic mapping|non-mappable]]. Unlike the [[spellbook of clairvoyance|clairvoyance spell]], this form of clairvoyance is not blocked by wearing a [[cornuthaum]] while not a [[wizard]].
 If [[blessed]], the potion grants 100-149 turns of [[intrinsic]] [[clairvoyance]], which gives you a 50% chance of mapping the surrounding 19x11 area every 15 turns <ref>{{sourcecode|potion.c|781|version=SLASH'EM 0.0.7E7F2}}</ref>. This is the same property that can be acquired from [[Aligned priest#Chatting, e.g. for protection|donating]] 200 to 400 times your [[experience level]] to an [[aligned priest]], but for a shorter duration than the 500-999 turns received from donating.