Silence of the Heart

As a reaction after an attack you can play dead and roll a Charisma(Deception) check and convince your enemies that you are dead, after doing so they will no longer attack you but instead move onto the rest of your party unless they, too, are also "dead". Also this allows you to control the blood flow of your body gaining resistance to bleeding out and also giving proficiency in the medicine skill. You gain advantage of the check roll if you have been shot buy a ranged attack, have just been knocked into a surface, are bleeding, or if you've just been stabbed. This also gives you resistance to poison damage since you can control the flow of the blood it resides in.