Posion blood

You transmute your blood to poison gaining these benefits:

You are immune to all poison damage 

When you are hit by an attack every creature within 5ft must make a DC 14 Constitution saving throw or take 1d6 poison damage. 

Items and spells involving health do not heal you because of your transmuted blood. Instead, you gain health from poisons and spells involving poison and tale damage from healing items and spells.