Gives Mountain Giants increased resistance to spell damage. This givesthe unit hero magic resistance, similar to the resistance that level 6+creeps have. Namely, you can't be Polymorphed, Possessed, etc, and alloffensive spells have a shorter duration on the target (such as stuns,Ensnare, etc). It DOES NOT reduce damage dealt to the target, however.That an effect of hero armor, not hero magic resistance.
