First, i think Resistant Hide is too powerful, straight up immunity to several damage types in a low-tier piece of armor, how does it protect from POISON ?! But it doesnt protect to cold? Its a hide! It seems Cold may of been added last, i havnt seen any cold magic cards and i see no reason why we wouldnt get access to an obvious path of magic. Resistant Hide should be scaled back a bit, to maybe 'always reduces X damage types by 2'. I've seen monsters using higher tier armors designed to counter magic, that are less effective than this =/
I'm pretty sure we need this card as it helps immensely with some ridiculously hard fights where you are pelted by magic from all directions. Monsters later in the game have plenty of ways to deal with armor so don't worry about it.
Just found a rare staff full of awesome cold magic so there seams to exist cold spells for players as well yay!