Bebilith
Huge elemental magical beast (demon)
Level 18 Solo Brute XP 10000

Initiative +16 (see dangersense)        Senses Perception +14; Darkvision, tremorsense 20
Spectral Death Web aura 3; each enemy within the aura that is hit by an attack loses all resistances until the end of its next turn.
HP 696; Bloodied 348
AC 30; Fortitude 30, Reflex 31, Will 29
Resist 20 fire, 20 variable (2/encounter)
Saving Throws +5
Speed 12, climb 12 (spider climb)
Action Points 2

(⚔) Reaving Claw (standard, at-will)

Reach 3; +21 vs AC; 2d10+6 damage, and the target takes a cumulative -1 penalty to AC each time it is hit until the end of the encounter.

⚔ Flashing Claws (standard, at-will)

The bebilith makes two reaving claw attacks against two different targets

⚔ Venomous Bite (standard; usable only while bloodied, recharge ⚅

+21 vs AC; 2d8+6 damage, and ongoing 10 poison damage (save ends.

ᗕ Flaming Web (minor, recharge ⚄⚅) ✦ Fire

Close blast 5; +19 vs Reflex; 2d8+10 fire damage, and the target is slowed and takes ongoing 10 fire damage (save ends both). First Failed Saving Throw: The target is restrained instead of slowed and takes ongoing 15 fire damage (save ends both).

Hunter's Reflexes (immediate reaction, when an enemy moves into an adjacent space; recharge ⚄⚅)

The bebilith shifts 4 squares. This shift can move through enemies' spaces.

Dangersense

The bebilith acts two times in a round, on initiative counts 20 and 10. It cannot delay or ready actions. On each turn, it has a standard action instead of its normal allotment of actions. It can use one immediate action between each pair of turns.

Alignment Chaotic evil        Languages Abyssal
Str 22 (+15)      Dex 25 (+16)      Wis 20 (+14)
Con 22 (+15)      Int 5 (+6)      Cha 19 (+13)

Published in Monster Manual 2, page(s) 52.