Giant Cobra Working Draft
Snake, Giant Cobra
Large Magical Beast
 Hit Dice: 3d10 (16 hp)
 Initiative: +7
 Speed: 30 ft. (6 squares), climb 20 ft, swim 30 ft.
 Armor Class: 15 (-1 size, +3 Dex, +3 natural), touch 12, flat-footed 12
 Base Attack/Grapple: +3/+7
 Attack: Bite +5 melee (1d8 plus poison)
 Full Attack: Bite +5 melee (1d8 plus poison)
 Space/Reach: 10 ft./5 ft.
 Special Attacks: Mesmerize animal, poison
 Special Qualities: Scent
 Saves: Fort +3, Ref +6, Will +2
 Abilities: Str 10, Dex 17, Con 11, Int 1, Wis 12, Cha 12
 Skills: Balance +11, Climb +11, Hide +8, Listen +5, Spot +6, Swim +8
 Feats: Improved Initiative, Weapon Finesse
 Environment: Any warm land
 Organization: Solitary, pair or quiver (3-6)
 Challenge Rating: 3
 Treasure: None
 Alignment: Always neutral
 Advancement: 4-5 HD (Large), 6-9 HD (Huge)
 Level Adjustment: —
 
An enormous cobra, as long and heavy as a large python.
 
A giant cobra is a larger, slightly magical version of an ordinary cobra  that is able to mesmerize animals by performing a swaying, hypnotic  "dance". A giant cobra only hunts during the day, it will normally try  to flee if encountered at night. They prefer warm-blooded prey up to the  size of a gnome or roe deer, and have no compunctions against eating  humanoids.
 
A giant cobra is intelligent enough to be trained by someone willing to  brave its deadly venom. Snake-charmers, serpent cults and assassins  occasionally keep these snakes. Giant cobras are most commonly trained  as guards, sacred animals, or to milk them of their venom. Even "tame"  giant cobras always remain dangerous and should be handled carefully.
 
Giant cobras lair in burrows they steal from other animals. They mate  once a year, then the female builds a nest and guards her clutch off  eggs until they hatch. A single female usually lays between a dozen and a  score of eggs. Giant cobra eggs are prized as delicacies by some wild  elves and jungle giants, and are also sought after by people wanting to  hatch the young snakes and raise them.
 
Giant cobras are usually between 12 and 30 feet long, but they can grow    considerably bigger than that. A typical specimen is 24 feet from nose    to tail and weighs 500 pounds.
 
COMBAT
 
Giant cobras try to use their poison bite as often as they can. They  often retreat into undergrowth or a burrow to give their poison time to  work, then return to eat any victims who fall to their venom.
 
A giant cobra can swallow a creature up to two size categories smaller  than itself, but this is a slow process requiring at least a minute of  time and a non-resisting meal, not an action it can perform in combat.
 Mesmerize Animals (Su): A giant cobra can paralyze animals as a   standard action by swaying slowly and steadily while staring at them.   Every animal within 30 feet of the snake that can see its swaying  must  make a successful Will save (DC 12) to avoid the effect.  Failure means  the creature is paralyzed for as long as the giant cobra continues to  sway (requiring a standard action every round) and for 1d6 rounds  thereafter. Mesmerizing sway is a  mind-affecting effect. The save DC is  Charisma-based.     
Poison (Ex): A giant cobra has a poisonous bite that deals initial and secondary  damage of 1d8 Con unless the victim succeeds at a DC 15 Fortitude save. The save DCs is Constitution-based and includes a +4 racial bonus.