Magic Prosthetic: You gain a magical prosthetic limb in the form of an arm or leg. This limb serves a melee weapon you're proficient in and deals 1D6 magical bludgeoning damage, as well as serving as an arcane focus.
Partial Magical Blood: While only having around half magic blood and half real blood, some magical blood still provides plenty of benefits without too many of its weakness. As a reaction, you can reduce any incoming non-magical damage by 1/2. This can be done a number of times equal to your proficiency bonus and all uses recharge after a short rest.
Surge: As a bonus action, you can empower your body's magical blood for a short amount time, allowing you to briefly go past your limits. For the next minute, your base movement speed increases by 10ft, you have advantage on all dexterity checks and saves, and you can make an attack with your prosthetic as a bonus action. At the end of the minute, you must make a DC-15 Constitution save or take a point of exhaustion.