Difference between revisions of "Sack of spiders"

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m (The actual formula applies a stepdown function, so the success calculation is a bit more complex than I thought. So I'll add the success rates from commit 981a8eba instead)
m (remove CBA category)
 
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{{item
 
{{item
 
  |itemtype=Miscellaneous item
 
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{{flavour|A woven silk bag. Opening it will release a number of spiders and other insects, as well as creating webs nearby. Evocations skill increases its effectiveness. There is a one in three chance of accidentally destroying the sack when using it.}}
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{{flavour|A woven silk bag. Opening it will cover the area with webs, spiders, and other skittering things. Evocations skill increases spider quality, quantity, and webbing.}}
  
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A '''sack of spiders''' is an evokable item which, when used, generates a [[Spider's Nest]]-themed group of friendly monsters, and also generates multiple [[web]] [[trap]]s on hostile monsters in your [[line of sight]]. [[Evocations]] skill affects both the strength and number of summoned allies.
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A '''sack of spiders''' is an evocable item which generates allies themed around the [[Spider's Nest]], and has a chance to create a [[web]] on hostile monsters in your [[line of sight]]. It can be used once being needing to be recharged with XP. [[Evocations]] affects the strength of allies, the chance to web opponents, and number of spiders.
  
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The success rate depends on Evocations<ref>{{source ref|0.21.0|evoke.cc|672}}</ref>: it is 30% at 0 skill, 60% at 10, 70% at 18, and 77% at 27.
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This item is [[alternate items|mutually exclusive]] with the [[box of beasts]]. Like with other miscellaneous evocables, only 1 sack of spiders (or box of beasts) will spawn in a given game.  
  
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The chance to destroy the sack on each use is 1/3 (regardless of [[Evocations]] skill).
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==Useful Info==
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On use, you'll summon 2 plus (<code>2 * Evocations/27</code> to <code>4 * Evocations / 27</code>) spiders, randomly rounded.<ref>{{source ref|0.31-b1|evoke.cc|406}}</ref>
  
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==Potential Results==
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The following monsters can be created, in ascending order of power:<ref>{{source ref|0.31-b1|evoke.cc|374}}</ref>
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Each successful use of a sack of spiders is guaranteed to produce at least 1-3 allies, plus an additional 1d(Evocations / 4) - 1.
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* {{Monsterlink|Scorpion}}
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* {{Monsterlink|Redback}}
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* {{Monsterlink|Culicivora}}
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* {{Monsterlink|Jumping spider}}
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* {{Monsterlink|Tarantella}}
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* {{Monsterlink|Wolf spider}}
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* {{Monsterlink|Steelbarb worm}}
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* {{Monsterlink|Demonic crawler}}
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* {{Monsterlink|Broodmother}}
  
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A table of potential results versus example amounts of Evocations skill:
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If your [[god]] despises a certain creature, it will be replaced with another one.
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Summons have a duration of 27 to 171 turns; it does not depend on Evocations skill.
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You have a <code>36 + 2 * Evocations</code> % chance to web a hostile monster not already constricted.<ref>{{source ref|0.31-b1|evoke.cc|342}}</ref>
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==Strategy==
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At low Evocations, a sack of spiders will often make weak allies... but they can still be useful as meat shields, and a [[redback]] or two can be very helpful in the early-game. At high levels of Evocations, it can create powerful allies and consistently web (i.e. [[net]]) enemies.
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==History==
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*In [[0.31]], sacks of spiders were re-introduced and reworked. Prior to this version:
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**They were a consumable item, which you could find multiple in a game. Each use had a 33% chance to consume the sack.
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**You could fail to create anything; Evocations skill decreased the chances.
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**The monster list was significantly different.
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*Sacks of spiders were removed in [[0.25]].
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*Prior to [[0.19]], sacks of spiders didn't stack. Instead, each sack of spiders had 5-15 charges.
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*Prior to [[0.18]], you could summon [[giant mite]]s, [[spider]]s and [[trapdoor spider]]s at low Evocations.
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*Prior to [[0.15]], the webs would be placed randomly, rather than targeting enemies.
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*Sacks of spiders were added in [[0.13]].
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===Old Monster List===
 
{| class="wikitable" style="text-align: center;"
 
{| class="wikitable" style="text-align: center;"
 
|Monster||Min. Skill||Max. Skill||
 
|Monster||Min. Skill||Max. Skill||
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|||0%||0%||0%||0%||0%||0%||0%||0%||0%||6.17%
 
|||0%||0%||0%||0%||0%||0%||0%||0%||0%||6.17%
 
|}
 
|}
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==Strategy==
 
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*A sack of spiders is nearly useless without at least 8 or so levels of Evocations. If you haven't put in the training, don't expect any results from this beyond a couple of quickly destroyed meat shields.
 
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*Be careful where you move after using a sack of spiders. Stepping into one of your own generated web traps is a good way to earn yourself [[YASD]].
 
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==History==
 
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*Prior to [[0.19]], sacks of spiders didn't stack. Instead, each sack of spiders had 5-15 charges.
 
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*Prior to [[0.18]], there were [[giant mite]]s, [[spider]]s and [[trapdoor spider]]s summoned if you [[evocation]] was still low.
 
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*In [[0.15]], the webs created when evoking a sack of spiders will target enemies, rather than being placed randomly.
 
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*Sacks of spiders were added in [[0.13]].
 
  
 
==References==
 
==References==
 
<references/>
 
<references/>

Latest revision as of 21:08, 19 January 2024

Version 0.31: This article may not be up to date for the latest stable release of Crawl.
Type Miscellaneous item
Name sack of spiders
Icon Sack of spiders.png
A woven silk bag. Opening it will cover the area with webs, spiders, and other skittering things. Evocations skill increases spider quality, quantity, and webbing.

A sack of spiders is an evocable item which generates allies themed around the Spider's Nest, and has a chance to create a web on hostile monsters in your line of sight. It can be used once being needing to be recharged with XP. Evocations affects the strength of allies, the chance to web opponents, and number of spiders.

This item is mutually exclusive with the box of beasts. Like with other miscellaneous evocables, only 1 sack of spiders (or box of beasts) will spawn in a given game.

Useful Info

On use, you'll summon 2 plus (2 * Evocations/27 to 4 * Evocations / 27) spiders, randomly rounded.[1]

The following monsters can be created, in ascending order of power:[2]

If your god despises a certain creature, it will be replaced with another one.

Summons have a duration of 27 to 171 turns; it does not depend on Evocations skill.

You have a 36 + 2 * Evocations % chance to web a hostile monster not already constricted.[3]

Strategy

At low Evocations, a sack of spiders will often make weak allies... but they can still be useful as meat shields, and a redback or two can be very helpful in the early-game. At high levels of Evocations, it can create powerful allies and consistently web (i.e. net) enemies.

History

  • In 0.31, sacks of spiders were re-introduced and reworked. Prior to this version:
    • They were a consumable item, which you could find multiple in a game. Each use had a 33% chance to consume the sack.
    • You could fail to create anything; Evocations skill decreased the chances.
    • The monster list was significantly different.
  • Sacks of spiders were removed in 0.25.
  • Prior to 0.19, sacks of spiders didn't stack. Instead, each sack of spiders had 5-15 charges.
  • Prior to 0.18, you could summon giant mites, spiders and trapdoor spiders at low Evocations.
  • Prior to 0.15, the webs would be placed randomly, rather than targeting enemies.
  • Sacks of spiders were added in 0.13.

Old Monster List

Monster Min. Skill Max. Skill Skill 0 Skill 3 Skill 6 Skill 9 Skill 12 Skill 15 Skill 18 Skill 21 Skill 24 Skill 27
B Worker ant.png Worker ant 0 13 16.67% 15.18% 7.66% 1.79% 0% 0% 0% 0% 0% 0%
B Soldier ant.png Soldier ant 0 13 83.33% 84.82% 52.68% 21.54% 7.53% 1.48% 0% 0% 0% 0%
s Redback.png Redback 6 19 0% 0% 39.66% 57.92% 56.7% 33.41% 12.25% 0% 0% 0%
s Redback.png Redback 8 27 0% 0% 0% 18.75% 28.69% 36.07% 33.04% 18.21% 12.53% 11.76%
s Jumping spider.png Jumping spider 10 27 0% 0% 0% 0% 7.09% 22.28% 28.57% 22.49% 15.48% 14.53%
s Orb spider.png Orb spider 12 29 0% 0% 0% 0% 0% 6.76% 19.83% 27.31% 18.8% 17.64%
s Tarantella.png Tarantella 13 29 0% 0% 0% 0% 0% 0% 6.31% 19.86% 23.93% 22.45%
s Wolf spider.png Wolf spider 15 29 0% 0% 0% 0% 0% 0% 0% 12.14% 29.25% 27.44%
y Ghost moth.png Ghost moth 21 27 0% 0% 0% 0% 0% 0% 0% 0% 0% 6.17%

References

  1. ↑ evoke.cc:406 (0.31-b1)
  2. ↑ evoke.cc:374 (0.31-b1)
  3. ↑ evoke.cc:342 (0.31-b1)
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