Tomb Spider Broodswarm
Medium shadow beast (spider, swarm)
Level 10 Lurker XP 500

Initiative +14        Senses Perception +5; tremorsense 10
Swarm Attack aura 1; each enemy that starts its turn within the aura is slowed until the start of its next turn.
HP 84; Bloodied 42
AC 24; Fortitude 21, Reflex 22, Will 20
Resist half damage from melee and ranged attacks; Vulnerable 5 against close and area attacks
Speed 5, climb 5 (spider climb)

(⚔) Dread Fangs (standard, at-will) ✦ Necrotic, Poison

+13 vs AC; 1d6+5 necrotic damage, and the target is immobilized and takes ongoing 5 necrotic and poison damage (save ends both).

Shadow Drift (standard; recharge ⚄⚅)

The tomb spider broodswarm shifts 5 squares and gains a +4 bonus to all defenses until the start of its next turn.

Web Walker

A tomb spider broodswarm ignores the effects of spider webs and spider swarms.

Alignment Evil        Languages -
Skills Stealth +15
Str 15 (+7)      Dex 21 (+10)      Wis 11 (+5)
Con 18 (+9)      Int 1 (0)      Cha 18 (+9)

Published in Monster Manual 2, page(s) 191.