Metallica’s European tour has already yielded a surprise cover of Queen’s “Stone Cold Crazy” for the first time in four years. Now, the group reached back to their 1991 chart-topping self-titled release to dust off “Of Wolf and Man” for the first time in years.The song made a steady appearance in 2012 as a part of the band’s show and a final play in March of 2013 before returning to the shelf…