Density Manipulator

Because of your bloodline, you became able to manipulate the density of your own body, make barriers, and move your limbs off of your torso.

Limb Manipulation

At 1st level, you can remove your hand from your body and use it as a mage hand. If the hand is hit, you take the damage. Also, you can harden your limbs, and you deal 1d4 + strength bludgeoning damage with them. You are proficient with your hands as weapons. The damage that they deal scales by level, dealing 1d6 at 6th, 1d8 at 14th, and 1d12 at 18th.

Shield Maker

By spreading your hands thin and making them incredibly dense, you can cast Shield by using one sorcery point per spell level you plan to cast it at. Metamagic cannot be used in conjunction with this. 

Weaponized Limbs & Phasing

At 14th level, you can increase the density of your hands when they aren't attached to you, giving them the ability to attack and deal the same amount of damage as when they're attached to you. (See the first feat for damage die.) You also gain the ability to phase through 1 to 5 inch thick walls or items by spending 8 sorcery points, any worn items or gear will not phase with you. At 18th level, you can phase through walls up to one foot in thickness. You can also make your hand phase through things. 

Indomitable Armor

At 18th level, you can make your skin so dense that any physical damage you take is halved and your AC increases by 5. If you have no armor on, your AC becomes 20. This lasts for one round, and you can use it once per day (recharges at dawn) OR use 10 sorcery points to use it.