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.
Spider Collective
CR 2
XP 600
N Medium magical beast
hp 13 (2d10+2)
Fort +4; Ref +5; Will +0
Defensive Abilities one from many; DR 5/bludgeoning; Immune collective immunities
Melee bite +4 (1d6+3 plus poison)
Base Atk +2; CMB +4; CMD 16 (canât be tripped)
Feats Improved Initiative
Skills Climb +10, Perception +9; Racial Modifiers +4 Perception