A behir is a particularly nasty subterranean beast with a crocodile’s head on a 40-ft long snake-like body with twelve sets of legs. These creatures move very fast and can climb vertically at half their speed. Their main method of attacking is to bite and wrap their body around their prey and squeeze. On the second round they can still bite but the held victim is now subject to 6 claw attacks. Every 10 rounds a behir can also breathe a 20-ft lightning bolt that does 4d6+24 damage unless a save vs breath is made for half damage. Occasionally (on a 20) a behir will swallow its victim whole.