Gorynych (CR 12)

Huge Dragon
Alignment: Usually chaotic evil
Initiative: +0; Senses: darkvision 60 ft., low-light vision, scent, Listen +27, and Spot +27
Languages: Common, Draconic, and Orc

AC: 27 (-2 size, +19 natural), touch 8, flat-footed 27
Hit Dice: 16d12+64 (168 hp)
Fort +16, Ref +10, Will +14
Speed: 60 ft., fly 120 ft. (clumsy)
Space: 15 ft./10 ft.
Base Attack +16; Grapple +33
Attack: Bite +23 melee
Full Attack: 3 bites +23 melee and 2 claws +21 melee and 6 tail whips
Damage: Bite 2d8+9, claws 2d6+4, tail whip 1d4+4
Special Attacks/Actions: Improved grab, rake 2d8+4, rend 4d8+13, tail wrap
Abilities: Str 28, Dex 11, Con 18, Int 11, Wis 14, Cha 13
Special Qualities: immunity to paralysis and sleep effects
Feats: Alertness; Flyby Attack; Great Fortitude; Iron Will; Multiattack; Track
Skills: Diplomacy +3, Hide +11, Intimidate +20, Jump +28, Listen +27, Sense Motive +12, Spot +27, and Survival +11
Advancement: 17-32 HD (Huge); 33-48 HD (Gargantuan)
Climate/Terrain: Temperate mountains
Organization: Solitary
Treasure/Possessions: Standard

Source: Lost Empires of Faerûn

Improved Grab (Ex): To use this ability, a gorynych must hit an opponent one or more size categories smaller than itself with a tail whip attack. If it wins the grapple check, it establishes a hold and uses its tail wrap attack. Against human-sized opponents, a gorynych usually chooses to grapple only with its tail to avoid being grappled itself, thereby reducing its grapple bonus to +13.

Rake (Ex): If a gorynych hits a grappled foe with all three bite attacks, it can rake with its claws. Attack bonus +23 melee, damage 2d8+4.

Rend (Ex): If a gorynych hits with two bite attacks, it latches onto the opponent's body and tears the victim apart like a wishbone. This attack automatically deals an extra 4d8+13 points of damage.

Tail Wrap (Ex): After a successful grab, a gorynych can attempt to wrap its opponent with some or all of its remaining tail whips with a single grapple check. Each tail whip beyond the first reduces the penalty for grappling without being grappled by -4. Thus, a gorynych with three tail whips wrapped around a foe has a grapple modifier of +21 (+33, -20 for choosing not to be grappled, +8 for two extra tail whips).

Skills: Because of its multiple heads and keen senses, a gorynych has a +4 racial bonus on Listen and Spot checks.