PFSRD:Whip Of Spiders
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Whip of Spiders
School conjuration (summoning); Level bard 2, druid 2, sorcerer/wizard 2, summoner 2, witch 2
Casting Time 1 standard action
Components V, S, M/DF (a square of red cloth)
Range 0 ft.
Effect whiplike swarm
Duration 1 round/level (D (see text)
Saving Throw none; Spell Resistance yes
You summon hundreds of Diminutive spiders, which cling together in the form of a whip made for a creature of your size. You can wield this object as if it were an actual whip, except you make a melee touch attack with it instead of a regular attack. Any creature you strike with the whip takes swarm damage as if it were attacked by a spider swarm (1d6 points of damage plus poison and distraction). The swarm whip is able to damage creatures with armor or natural armor, even if a normal whip could not. It cannot be used to make bull rush, grapple, or trip attacks, and (unlike a swarm) it is subject to a miss chance for concealment and cover.
The whip is immune to all weapon damage, is never staggered or reduced to a dying state by damage, and is immune to any spell or effect that targets a specific number of creatures (including single-target spells such as disintegrate). The whip takes half again as much damage from spells or effects that affect an area, but since it is considered part of your gear, it takes damage only if you fail a saving throw with a roll of a 1 or if it is specifically targeted by an opponent. The whip does not have a swarm's susceptibility to high winds.
As a standard action, you can transform the whip into a spider swarm (all squares of the swarm must be within 15 feet of you); thereafter it functions as summon swarm. The spider swarm has 3 hit points and persists in that form for 2 rounds or until the end of this spell's duration, whichever comes first.