This creature resembles a gigantic centipede covered with chitinous plates of hardened bone that run along its back in double rows. Its rear portion ends in a long, scorpion-like stinger.
Stegocentipede CR 5
A stegocentipede raises its spines instinctively when it enters combat and rushes its prey. Opponents are bitten and stung to death.
A stegocentipede raises its spine-plates during combat, and moves rapidly back and forth while attacking. Creatures in a space adjacent to a stegocentipede must succeed on a DC 16 Reflex save each time they attack it or take 2d8+2 points of damage from the spine-plates, whether the attack was successful or not. The save DC is Constitution-based.
Environment temperate forests
Stegocentipedes are rumored among sages to have come to the Material Plane from another plane or dimension, though no proof has been found to support this theory. Whatever their origin, they are greatly feared by adventurers and other dungeon dwelling denizens for their poisonous bite and sting.
A typical stegocentipede is 18 feet long. A stegocentipede ranges in color from brown to green.
Stegocentipede from the Tome of Horrors Complete, Copyright 2011, Necromancer Games, Inc., published and distributed by Frog God Games; Author Scott Greene, based on original material by Gary Gygax.