Devourer
Large Aberration (Zerg)
Hit Dice: 20d8+143 (233 hp)
Initiative: +2 (+2 Dex)
Speed: 10 ft. (2 squares), fly 90 ft. (good)
Armour Class: 23 (+2 Dex, -1 size, +12 natural), touch 11, flat-footed 21
Base Attack/Grapple: +15/+27
Attack: Acid spore +18 ranged (2d6+8)
Full Attack: Acid spore +18 ranged (2d6+8)
Space/Reach: 10 ft./5 ft.
Special Attacks: Acid Spores.
Special Qualities: Darkvision 60 ft., fast healing 8, immunity to poison and cold, resistance to acid and eletricity 15, Zerg traits.
Saves: Fort +13, Ref +8, Will +13
Abilities: Str 27, Dex 15, Con 25, Int 1, Wis 13, Cha 7
Skills: Listen +13, Spot +12
Feats: Flyby Attack, Hover, Improved Natural Armor, Improved Natural Attack (acid spores), Toughness, Weapon Focus (acid spores), Wingover
Environment: Any
Organization: Solitary, pair, pack (6-15), or flight (2-6, plus 2-6 Guardians,  2-12 Scourge, and 6-12 Mutalisks)
Challenge Rating: 15
Treasure: None
Alignment: Lawful evil
Advancement: 21-30 HD (Large), 31-40 HD (Huge)
Level Adjustment: --

   This flying creature is similiar to a Mutalisk - its body is thicker, and curves the opposite way. Small wings project from behind its head, rather than near the end of its tail.

Description
   Bred from the Mutalisk strain, the Devourers are a deadly addition to the Swarm. These large, flying behemoths are capable of spewing their vile acid at any airborne ships or creatures, causing significant corrosive damage. The venom of the Devourer consists of toxins that can eat through any known substance, including the reinforced armor plating of Terran and Protoss capital ships. The venom also contains Acid Spores that hinder the fighting ability of the target, and these Spores often splash off the target to hit additional nearby enemy craft. Despite its large size, the Devourer can travel through the air at surprising speeds

Combat
   The Devourer has no effective means of combating ground-based forces - however, its attacks are deadly to enemy ships, and Mutalisks often accompany Devourers into battle.
   Acid Spores (Ex): The Devourer's attack, which has a range increment of 600 feet, can only be directed at other airborne targets. When a target is struck by the attack, a number of acidic spores bounce off and attach to the target. These corode machinery, preventing spacecraft from making more than one attack per round. In addition, a target that has been struck by acid spores takes an additional 1d6 points of damage times the number of acid spores it has been struck with (maximum 9d6) each time it is sucessfully hit by another attack, whether from the Devourer or another source.