Ok I have had this stuck in my head for a while and I have searched our several things trying to figure out if it's just a coincidence, or if Brandon purposely put a correlation between the damage the shades of hel do to the people they touch and the damage Nightblood does to the individual wielding them.
My biggest question is we know silver reduced the damage done by a shade, and we know eventually it will have a larger roll in the cosmere, but do we think it could reduce the damage Nightblood does to the person who draws it?