you get a tail that when you stab someone it deals 1d4 acid damage, every turn until the treat it or die.

 you can grow a set of metal wings that you can fly with. Fly speed of 40 ft.

 sword hand-1d8, machine gun-1d6 range of 30/60. you have proficiency with both weapons.

 Every 1 hour(s) you heal 1d4HP Sun weakness. You can't heal while in direct sunlight.

you need to drink 1 gallon of blood(Oil) every 3-5 days. After 5 days without blood(Oil) you lose the ability to heal from any source. after 10 days you take 1 point of damage every hour.