Scorched Toxin Constitution

Youve always lived life dangerously, never dodging or wearing heavy armor instead always tanking hits no matter the enemy, tanking poison, venom, toxins, magic, fire, acid, etc. Through this you have tempered your body to a supernatural degree. Your veins run with magic resistant blood making it harder for curses and magical banes to be placed upon you, your blood eats away at sickness and poison, and your skin lets acid slide off like glass.