Hit Dice: 9d10+45 (94 hp)
Initiative: +1
Speed: 40 ft. (8 squares), climb 15 ft.
Armor Class: 20 (–2 size, +1 Dex, +11 natural), touch 9, flat-footed 19
Base Attack/Grapple: +9/+25
Attack: Bite +15 melee (2d4+12)
Full Attack: Bite +15 melee (2d4+12)
Space/Reach: 15 ft./10 ft.
Special Attacks: Breath weapon, constrict 2d8+8, improved grab, rake 1d4+4, swallow whole
Special Qualities: Can’t be tripped, darkvision 60 ft., immunity to electricity, low-light vision, scent
Saves: Fort +11, Ref +7, Will +5
Abilities: Str 26, Dex 13, Con 21, Int 7, Wis 14, Cha 12
Skills: Climb +16, Hide +5, Listen +4, Spot +4, Survival +2
Feats: Alertness, Cleave, Power Attack, Track
Environment: Warm hills
Organization: Solitary or pair
Treasure: Standard
Alignment: Often neutral
Advancement: 10–13 HD (Huge); 14–27 HD (Gargantuan)
Behirs speak Common.
Breath Weapon (Su): 20-foot line, once every 10 rounds, damage 7d6 electricity, Reflex DC 19 half. The save DC is Constitution-based.
Constrict (Ex): A behir deals 2d8+8 points of damage with a successful grapple check. It can make six rake attacks against a grappled foe as well.
Improved Grab (Ex): To use this ability, a behir must hit a creature of any size with its bite attack. It can then attempt to start a grapple as a free action without provoking an attack of opportunity.
If it wins the grapple check, it it establishes a hold and can attempt to constrict the opponent or swallow the opponent in the following round. Rake (Ex): Six claws, attack bonus +15 melee, damage 1d4+4.
Swallow Whole (Ex): A behir can try to swallow a grabbed Medium 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.
A swallowed creature takes 2d8+8 points of bludgeoning damage and 8 points of acid damage per round from the behir’s gizzard. A swallowed creature can cut its way out by using a light slashing or piercing weapon to deal 25 points of damage to the gizzard (AC 15). Once the creature exits, muscular action closes the hole; another swallowed opponent must cut its own way out.
A behir’s gizzard can hold 2 Medium, 8 Small, 32 Tiny, or 128 Diminutive or smaller opponents.
Skills: Behirs have a +8 racial bonus on Climb checks and can always choose to take 10 on Climb checks, even if rushed or threatened.