Snakemen of the Underworld: Rattlers

Rattler Snakemen

No. Enc.	1d6 (patrol) or 4d10 (lair)
Alignment:	Chaotic
Movement:	120' (Swim 60')
Armor Class:	7
Hit Dice (hp):	3 (13 hp)
Attack:	1 weapon + 1 bite
THAC0:	17
Damage:	1d8 (weapon)/1d6 (bite) + poison
Save As:	F3
Hoard Class:	XX1 in lair
Size:	Medium
Type:	Humanoid
Intelligence:	10-11 (Average)
XP Value:	110 xp

The Rattler is one of the most common classes of snakeman found on Kaelaross. They are often the rank and file of snakeman armies after the non-serpentine spear-fodder.
Rattlers have a venomous bite - anyone hit by a rattler's bite must save vs poison or lose 1d6hp per round over 2d4 rounds. This may be removed by Neutralise Poison or delayed by a Slow Poison spell.
The rattler has a bony rattle on the end of it's tail, and when frightened or angry the rattler will emit a fearsome rattle that chills the bones of its opponents. Anyone hearing this must make a save vs paralyzation.  Those who fail and have 2HD/2 levels or less are paralyzed with fear for 1d6 rounds. Those with more than 2 HD or levels and fail suffer -2 to hit and saves for 1d6 rounds. A target can only be affected by any rattler's tail once per day. Anything immune to mind-affecting spells is also immune to the rattle. 
Rattlers, like other snakemen, are usually found in the Underworld. Very rarely are they found anywhere in actual sunlight, though some find their ways into smaller caves and dungeons. Their coloration varies between different snakeman tribes and cities. but is often mottled grey, golden brown and black, blending in with the stone. They all have 60' infravision and excellent sense of smell (via their forked tongues, which taste the air) and are capable trackers, especially in an underground environment. Rattlers on average are about  5' high and 14' long.