Fans of World of Warcraft are deeply impressed by "Death Knight", which is the first "hero class" of the popular MMO. The death knight hunted down the Lich King Arthas Menethil. They essentially use the power of blood, death and ice to lead the Lich King's forces. However, as adventurers, they used their power as a powerful tank and destroyed the dealer.However, the death knights in "World of...