Blizzard has previously shown Barrens cards that work with WoW cataclysm Gold certain spell schools. Spirit Healer, the neutral card is an example. It works especially with Holy spells. The new famous Shaman minion Bru'kan offers an enormous increase in Nature Spell Damage however it does not work with other kinds of spells. It is believed that Blizzard will utilize this to provide an increased...