There are actually 4 blood styles: A, B, AB, or O. Also, blood is possibly Rh-favourable or Rh-destructive. So if you have type A blood, It is really possibly A constructive or possibly a damaging. Which type you might be is essential if you want a blood transfusion. And https://socialupme.com/story5507466/everything-about-blood-castle-mu-online