Sack of spiders

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Version 0.18: This article may not be up to date for the latest stable release of Crawl.
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Type Miscellaneous item
Name sack of spiders
Icon Sack of spiders.png
A woven silk bag. Something appears to be moving inside...

Opening this bag will release a number of spiders friendly to your cause. You might need to dust off the cobwebs after, however.

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 traps in the area. Evocations skill affects both the strength and number of summoned allies, but not the success rate - that is set at 80% regardless of your character's stats and skills. Each sack generates with 5-15 charges, and cannot be recharged in any way.

Potential Results

Each successful use of a sack of spiders is guaranteed to produce at least 1-3 allies, plus an additional 1d(Evocations / 4) - 1.

A table of potential results versus example amounts of Evocations skill:

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
a Worker ant.png Worker ant 0 13 16.67% 15.18% 7.66% 1.79% 0% 0% 0% 0% 0% 0%
a 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%

Strategy

  • 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.
  • 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.

History

Prior to 0.18, there were giant mites, spiders and trapdoor spiders summoned if you evocation was still low.

In 0.15, the webs created when evoking a sack of spiders will target enemies, rather than being placed randomly.

Sacks of spiders were added in 0.13.