Rastakhan's Rumble Guide
Hero PowerGain 2 Armor.
Most people would say this is the worst hero ability, but that's only partially true, it bad in any deck besides a Warrior deck. Any Warrior control deck has armor as a large part of it with armorsmiths, shield blocks, and shield slams. So really for what the Warrior is able to do this is a fairly good hero power, for the Warrior any way.