Magically Infused Blood
At 7th level, your blood weapons count as magical for the purpose of overcoming resistance and immunity to nonmagical attack and damage. You also gain +1 to hit and damage with blood weapons. This bonus increases to +2 at level 14 and +3 at level 20. Ammunition coated in your blood counts as magical. Your blood armor now lets you use your Constitution modifier instead of your Dexterity.