You know pain, you know what it is like to feel your bones break, your skin burnt, your flesh cut, your very blood flowing out of your body, and all it does is make you stronger. With any type of effect that harms you now, provided you survive it, you gain a scaling resistance that reduces that to effectively zero. Have your ribs crushed and that same blow will have no more of an effect than a stiff breeze upon your skin, have your arm burnt with and that same blaze would have the same effect as the sun on an autumn day. As a bonus you’ve gained an absurd tolerance for pain.