The Lost DwarvesThis first encounter in Uldaman is only available to Horde, as the three dwarves, Baelog (41+), Eric "The Swift" (40+), and Olaf (40+), are friendly to Alliance players. Each of the Lost Dwarves has a special ability: Baelog's ranged attack, Eric's Rushing Charge, and Olaf's Shield Slam.
Behind the three Lost Dwarves, loot the chest to receive the Gni'kiv Medallion which you will need to summon Ironaya.
ReveloshRevelosh is a Trogg who's accompanied by two non-elite trogg adds. The boss drops The Shaft of Tsol, which you will need to summon Ironaya.
IronayaBefore the encounter, one player will need to combine The Shaft of Tsol with the Gni'kiv Medallion, both looted from the previous bosses.
Ironaya is hard to kill - with high armor, a lot of hit points, immunity to damage over time effects (DoTs) and a knock back ability. Beyond these factors, the fight is a straightforward tank and spank.
Obsidian SentinelObsidian Sentinel is essentially the boss version of the Stone Steward mobs with higher armor, hit points, and damage over time (DoT) effect immunity.
At 66% and 33%, Obsidian Sentinel will spawn two smaller, non elite Obsidian Shard.
Ancient Stone KeeperAncient Sone Keeper is similar to the other stone mobs in the instance, with high health, armor, and immunity to DoT effects.
This boss also has a notable Sand Storms ability, which is an AoE slow and silence.
Galgann FirehammerThis boss is a Fire casting Dark Iron Dwarf accompanied by two Shadowforge Geologist as adds.
This boss is the first in the instance to indicate any potential association of the Dark Iron Dwarves with Ragnaros.
GrimlokGrimlok is another trogg boss in Uldaman, and he is accompanied by a Stonevault Geomancer, Stonevault Brawler, and Jadespine Basilisk.
The basic strategy is to focus down Grimlok while the other adds are CC'd.
If your group does not have three CC's available, focus down the Basilisk first.
ArchaedasThe final boss of Uldaman is Archaedas, a level 47+ giant. The boss has Ground Tremor ability, which stuns nearby enemies. Archaedas also summons a lot of non-elite adds. Because of the adds which are summoned from the room the boss is found in, many groups will choose to kite the boss on pull all the way up the ramps to the previous large, circular room with columns to down Archaedas.
The boss will continue to summon non-elite Earthern Guardians and Vault Warder adds during the fight. At 20% health, Archaedas will spawn 4 elite adds who also die when the boss does. Groups who have the DPS and can handle the adds well enough should focus on downing the boss while other groups may opt to kill one or two adds before focusing down the boss.