Players on World of Warcraft's Public Test Realms have gone up against a brand new boss, XT-002 Deconstructor, part of the new Ulduar raid, set to arrive in the game as part of the massive upcoming Patch 3.1.
XT-002 Deconstructor, seen in the video below, is a large robot in the scrapyard area of Ulduar. He has a number of nasty debuffs which require players to be extremely alert, else they risk taking the rest of the group down with them. There are also additional minions that tackle players during the encounter, requiring players to change focus quickly and deal with them before they overwhelm the group.