This is mostly a copy&paste of the draconic bloodline, with a few tweaks to jabber it up. Enjoy!
At some point in your family's history, a jabberwock interbred with your bloodline, and now its ancient power flows through your veins.
Class Skill: Acrobatics.
Bonus Spells: mage armor (3rd), resist energy (5th), wind wall (7th), confusion (9th), spell resistance (11th), form of the dragon I (13th), form of the dragon II (15th), form of the dragon III (17th), wish (19th).
Bonus Feats: Blind-Fight, Great Fortitude, Improved Initiative, Power Attack, Quicken Spell, Skill Focus (acrobatics), Skill Focus (Knowledge [nature]), Toughness.
Bloodline Arcana: Whenever you cast a spell with an fire descriptor, that spell deals +1 point of damage per die rolled.
Bloodline Powers: The power of a jabberwock flows through you and manifests in a number of ways.
Claws (Su): Starting at 1st level, you can grow claws as a free action. These claws are treated as natural weapons, allowing you to make two claw attacks as a full attack action using your full base attack bonus. Each of these attacks deals 1d4 points of damage plus your Strength modifier (1d3 if you are Small). At 5th level, these claws are considered magic weapons for the purpose of overcoming DR. At 7th level, the damage increases by one step to 1d6 points of damage (1d4 if you are Small). At 11th level, the threat range of the claws increases by 2. You can use your claws for a number of rounds per day equal to 3 + your Charisma modifier. These rounds do not need to be consecutive.
Dragon Resistances (Ex): At 3rd level, you gain resist 5 against fire and a +1 natural armor bonus. At 9th level, your fire resistance increases to 10 and natural armor bonus increases to +2. At 15th level, your natural armor bonus increases to +4.
Eye Rays (Su): At 9th level, you gain an eye ray attack. You can project beams of fire from your eyes as a ranged touch attack as a standard action, with a range increment of 60 feet. You project two beams, and can target different creatures with these beams if you wish as long as both targets are within 30 feet of each other. These beams deal 1d6 points of fire damage per sorcerer level. At 9th level, you can use this ability once per day. At 17th level, you can use this ability twice per day, and a creature that takes damage from an eye beam suffers burn.. At 20th level, you can use this ability three times per day.
Whiffling Wings (Su): At 15th level, leathery dragon wings grow from your back as a standard action, giving you a fly speed of 40 feet with poor maneuverability. While in flight and casting spells with somatic components, your violent flapping and somatic gestures create a protective barrier of wind, causing ranged attacks take a -4 penalty to hit you until the start of your next turn. You can dismiss the wings as a free action.
Power of the Jabberwock (Su): At 20th level, your jabberwockian heritage becomes manifest. You gain immunity to fire. You also gain DR10/Vorpal. Furthermore, you are always considered to be on your home plane, regardless of what plane you find yourself upon. You never gain the extraplanar subtype.