The Cobalt subset of the Blacksmithing tradeskill is a Plate armor collection based around Defense. This makes it of most interest to Paladin, Warrior, and Death Knight tanks in Player vs Environment (PvE) scenarios. Consisting of 8 pieces of armor it is a fairly complete gear set, while not being an actual Set. The cobalt set is easy to make and obtain at level 70, allowing the player to enter beginner Northrend instances as adequately geared tanks, which are important to the tank and spank nature of five man dungeons.