Behir (CR 8)
Huge Magical Beast
Alignment: Often neutral
Initiative: +1 (Dex); Senses: darkvision 60 ft., low-light vision, scent, Listen +4, and Spot +7
AC: 20 (-2 size, +1 Dex, +11 natural), touch 9, flat-footed 15
Hit Dice: 9d10+45 (94 hp)
Fort +11, Ref +7, Will +5
Speed: 40 ft., climb 15 ft.
Space: 15 ft./10 ft.
Base Attack +9; Grapple +25
Attack: Bite +15 melee
Full Attack: Bite +15 melee
Damage: Bite 2d4+12
Special Attacks/Actions: Breath weapon, constrict 2d8+8, improved grab, rake 1d4+4, swallow whole
Abilities: Str 26, Dex 13, Con 21, Int 7, Wis 14, Cha 12
Special Qualities: Cannot be tripped, immunity to electricity
Feats: Alertness; Cleave; Power Attack; Track
Skills: Climb +16, Hide +5, Listen +4, Spot +7, and Survival +2
Advancement: 10-13 HD (Huge); 14-27 HD (Gargantuan)
Climate/Terrain: Warm Hills
Organization: Solitary or pair
Breath Weapon (Su): Line of lightning 5 feet wide, 5 feet high, and 20 feet long once a minute; damage 7d6. Reflex half DC 19.
Improved. Grab (Ex): To use this ability, the behir must hit with its bite attack. If it gets a hold, it can attempt to swallow or constrict the opponent.
Swallow Whole (Ex): A behir can try to swallow a grabbed Medium-size or smaller opponent by making a successful grapple check. A behir that swallows an opponent can use its Cleave feat to bite and grab another opponent.
The swallowed creature takes 2d8+8 points of crushing damage and 8 points of acid damage per round from the behir's gizzard. A swallowed creature can also cut its way out by using claws or a Small or Tiny slashing weapon to deal 25 points of damage to the gizzard (AC 20). Once the creature exits, muscular action closes the hole; another swallowed opponent must again cut its own way out.
The behir's gizzard can hold two Medium-size, four Small, eight Tiny, sixteen Diminutive, or thirty-two Fine or smaller opponents.
Constrict (Ex): A behir deals 2d8+8 damage with a successful grapple check against Gargantuan or smaller creatures. It can use its claws against the grappled foe as well.
A behir usually bites and grabs its prey first, then either swallows or constricts the opponent. If beset by a large number of foes, it uses its breath weapon.