This creature appears to be a massive spider at least as large as a human. Closer inspection reveals the creature is actually a swarm of spiders crawling and squirming all over each other.
AC 16, touch 12, flat-footed 14 (+2 Dex, +4 natural)
hp 13 (2d10+2)
Fort +4; Ref +5; Will +0
Defensive Abilities one from many; DR 5/bludgeoning; Immune collective immunities
Weaknesses collective vulnerabilities
Str 14, Dex 15, Con 12, Int 6, Wis 10, Cha 11
Base Atk +2; CMB +4; CMD 16 (can’t be tripped)
Feats Improved Initiative
Skills Climb +10, Perception +9; Racial Modifiers +4 Perception
SQ collective traits
Attack bonus +4 ranged, damage 1d6. A creature struck is subjected to the spider collective’s poison.
Base template: Collective Creature (CR +1)
Environment warm forests
A spider collective attacks by biting its opponent and injecting it with its poison.
Spider Collective from the Tome of Horrors Complete, Copyright 2011, Necromancer Games, Inc., published and distributed by Frog God Games; Author Erica Balsley.