Monstrous Centipede, Colossal (CR 9)
Alignment: Always Neutral
Initiative: +1 (Dex); Senses: darkvision 60 ft. and Spot +4
AC: 20 (-8 size, +2 Dex, +16 natural), touch 4, flat-footed 18
Hit Dice: 24d8+24 (132 hp)
Fort +15, Ref +8, Will +8
Speed: 40 ft., climb 40 ft.
Space: 30 ft./20 ft.
Base Attack +18; Grapple +42
Attack: Bite +18 melee
Full Attack: Bite +18 melee
Damage: Bite 4d6+12 and poison
Special Attacks/Actions: Poison
Abilities: Str 27, Dex 13, Con 12, Int -, Wis 10, Cha 2
Special Qualities: Vermin
Skills: Climb +16, Hide -7, and Spot +4
Advancement: 25-48 HD (Colossal)
Climate/Terrain: Any underground
These creatures travel wherever hunger leads them. They prefer to feed on small animals but do not hesitate to attack humanoids or other larger prey. Monstrous centipedes are long and low: 120 feet long, 16 feet wide* and 8 feet high. *This number includes the centipede's body and its legs; the actual body width is about a third of the total.