Gargantuan Fiendish Behir, Barbarian 2 (Advanced Hit Dice) CR 16
Always Neutral Evil Gargantuan Magical Beast
Init +1 (+1 dex)
AC 22 FF 21 Touch 7
(-4 size, +1 Dex , +15 natural)
HD: 20
HP: 252 (18d10+126, 2d12+14)
Fort +21 Ref +12 Will +8
Speed 40ft, Climb 15ft
Base Atk +20 Grp +44
Attack: Bite +28 2d6+18
Max Power Attack: Bite +10 2d6+54
Half Power Attack: Bite +19 2d6+36
Grapple Attack: Constrict +44 3d8+12
Grapple Attack: Swallow Whole (+8 acid) +44 3d8+12
Attack: 6 Rakes (only with successful Constrict) +28 1d6+6
Max Power Attack: 6 Rakes (only with successful Constrict) +10 1d6+24
Half Power Attack: 6 Rakes (only with successful Constrict) +19 1d6+15
Full Attack: Bite (w/Improved Grab) +28 2d6+18
Space 20 ft. (4 squares) Reach 15 ft. (3 squares)
Abilities Str 34(+12) Dex 13(+1) Con 25(+7) Int 7(-2) Wis 14(+2) Cha 12(+1)
Stat Points Gained From Advancement: 3
Total Feats: 7
Feats: Power Attack, Track
Skill Points: 25
Skills: Climb +22, Craft(Armorsmithing, Trapmaking) +0, Handle Animal +3, Hide +3, Intimidate +3, Jump +14, Listen +4, Ride +3, Spot +4, Survival +4, Swim +14
Breath Weapon(Su): Reflex save DC 26(+9 HD, +0 Racial, +7 Con, +0 Feat) halves damage
20ft line of Electricity 7d6 (every 10 rounds)
Improved Grab(Ex): After hitting with a melee 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 establishes a hold and can constrict in the same round as a free action.
Constrict(Ex): As a grapple attack the creature can squeeze its opponent viciously.
Damage Reduction(Su): 10/magic
Cold Resistance(Ex): 10
Fire Resistance(Ex): 10
Darkvision(Ex): Darkvision up to 60ft.
Spell Resistance(Ex): 23
Smite good(Su): 1/day a fiendish creature can smite a good foe and add additional 18(1/HD) damage to the attack. If the smite is used against a foe that is not good it adds no additional damage but the smite is still used for the day.
Fast movement(Ex): A barbarian's land speed is faster than the norm for his race by +10 feet. This benefit applies only when he is wearing no armor, light armor, or medium armor and not carrying a heavy load. Apply this bonus before modifying the barbarian's speed because of any load carried or armor worn.
Illiteracy(Ex): Barbarians are the only characters who do not automatically know how to read and write. A barbarian may spend 2 skill points to gain the ability to read and write all languages he is able to speak. A barbarian who gains a level in any other class automatically gains literacy. Any other character who gains a barbarian level does not lose the literacy he or she already had.
Rage(Ex): A barbarian can fly into a rage a certain number of times per day.
In a rage, a barbarian temporarily gains a +4 bonus to Strength, a +4 bonus to Constitution, and a +2 morale bonus on Will saves, but he takes a -2 penalty to Armor Class. The increase in Constitution increases the barbarian's hit points by 2 points per level, but these hit points go away at the end of the rage when his Constitution score drops back to normal. (These extra hit points are not lost first the way temporary hit points are.) While raging, a barbarian cannot use any Charisma-, Dexterity-, or Intelligence-based skills (except for Balance, Escape Artist, Intimidate, and Ride), the Concentration skill, or any abilities that require patience or concentration, nor can he cast spells or activate magic items that require a command word, a spell trigger (such as a wand), or spell completion (such as a scroll) to function. He can use any feat he has except Combat Expertise, item creation feats, and metamagic feats. A fit of rage lasts for a number of rounds equal to 3 + the character's (newly improved) Constitution modifier. A barbarian may prematurely end his rage. At the end of the rage, the barbarian loses the rage modifiers and restrictions and becomes fatigued (-2 penalty to Strength, -2 penalty to Dexterity, can't charge or run) for the duration of the current encounter (unless he is a 17th-level barbarian, at which point this limitation no longer applies; see below). A barbarian can fly into a rage only once per encounter. At 1st level he can use his rage ability once per day. At 4th level and every four levels thereafter, he can use it one additional time per day (to a maximum of six times per day at 20th level). Entering a rage takes no time itself, but a barbarian can do it only during his action, not in response to someone else's action.
Uncanny Dodge(Ex): At 2nd level, a barbarian retains his Dexterity bonus to AC (if any) even if he is caught flat-footed or struck by an invisible attacker. However, he still loses his Dexterity bonus to AC if immobilized. If a barbarian already has uncanny dodge from a different class, he automatically gains improved uncanny dodge instead.
Advancement [10-13(Huge), 14-27(Gargantuan)]
Link for 3.5 version of creature
Link for Pathfinder version of creature