Schradinger said
He doesnt just have good physical defense. He has phenomenal physical defense. Tempered steel can apparently reach as high as an 8.5 on the MOHs scale of hardness, and with your skin being even harder than that it's approaching the level of a diamond regarding scratch resistance. Given that your skin (unlike actual steel and diamond), would still have to be supple and immune to fracturing, you'd be all but immune to bullets and blades (I'm not even sure a supersonic sword strike from Mifune would cause anything more than surface damage, and he currently has the most powerful single physical attack of any character), and his resistance to heat based on his anatomy alone would be measured in thousands of degrees (without taking his magical resistance into account).Unless his insides are still just as frail and squishy as normal people, other characters would pretty much be limited to suffocation in order to defeat him (since having insides tougher than tempered steel would pretty much rule out everything else from lightning to even exceedingly potent acid).
What character tier are we working with anyway?