Zergling
Medium Aberration (Zerg)
Hit Dice: 3d8+6 (19 hp)
Initiative: +2 (+2 Dex)
Speed: 50 ft. (10 squares), burrow 10 ft.
Armour Class: 16 (+2 Dex, +4 natural), touch 12, flat-footed 14
Base Attack/Grapple: +2/+3
Attack: Claw +4 melee (1d6+1/18-20/x3)
Full Attack: 2 claws +4 melee (1d6+1/18-20/x3) and bite -1 melee (1d8+1)
Space/Reach: 5 ft./5 ft.
Special Attacks: Rake (2d6+1).
Special Qualities: Darkvision 60 ft., fast healing 2, immunity to poison and cold, resistance to acid and eletricity 15, Zerg traits.
Saves: Fort +3, Ref +3, Will +4
Abilities: Str 13, Dex 15, Con 15, Int 1, Wis 13, Cha 7
Skills: Hide +5 (+9 underground), Listen +4 (+8 underground)
Feats: Run, Weapon Focus (claw)
Environment: Any
Organization: Solitary, pair, pack (6-15), horde (20-50 and 5-7 Hydralisks), or brood (100-200, 24-37 Hydralisks and 3-7 Ultralisks)
Challenge Rating: 3
Treasure: None
Alignment: Lawful evil
Advancement: 4-6 HD (Medium), 7-9 HD (Large)
Level Adjustment: --

   This creature is about the size of a large dog, with a short tail and tough carapace. Its back legs are long, while its front legs end in sickle-like claws. Beneath its head rest two equally sharp fangs, and it chitters and jumps about restlessly.

Description
   The small, savage Zergling is one of the few breeds that a core species has been found for. It is so closely related to the dune-runners of Zz’gash that it is believed that the Zerg at some point encountered and "absorbed" the DNA structure of the dune-runners. Their DNA structure is so simple to replicate that two Zerglings can be created from a single Larva.

Combat
   The Zerglings are little more than feral animals. Mutated by the Zerg to be more efficient killers, the voracious creatures are capable of ripping a larger creature to shreds with their razor-limb sickles and sharp fangs.
   Augmented Critical (Ex): Due to its sickle-bladed forelegs, a Zergling's claw attack threatens a critical hit on a natural attack roll of 18–20, dealing triple damage on a successful critical hit.
   Rake (Ex): If a Zergling begins its turn grappling with a foe, it may make two claw attacks at a +4 bonus. These attacks deals 2d6+1 points of damage.
   Skills: Zerglings have a +4 racial bonus to Hide and Listen checks while underground.