Iron dwarf

Iron dwarves, sometimes referred to simply as irons, are a type of dwarf found in Northrend made of iron and etched with runes of power, with lightning pulsing beneath their thick, metallic skin. Keeper Loken, corrupted by the Old God Yogg-Saron who took control of the titan facility of Ulduar, churned out entire armies of iron dwarves through the Forge of Wills. Following Loken's death and Yogg-Saron's defeat, they have then re-entered the service of the Keepers as evidenced in Ulduar during the Burning Legion's third invasion. The Ulduar Keepers then allied with Odyn and his Valarjar to combat the demons.

They can craft golems and cities made of metal as well. Also, the iron dwarves are capable of bending the stone giants to their will by the use of runes, similar to the ones that are etched in to their own skins. They use these Runed Giants to wage war on the earthen and the giants of earth and stone.

Origin
Thousands of years ago, their capital, Thor Modan, was destroyed by the stone giants. The events surrounding the war are unknown.

They took part in a great war against the earthen where Val'anyr, Hammer of Ancient Kings was shattered.

For thousands of years the imprisoned Old God Yogg-Saron was unable to do more than keeping the Keepers quiet and complacent inside Ulduar. His grasp on them was tenuous, and convincing them to directly help the Old God had proven fruitless in the past. It was not until Cho'gall of the Old God-worshiping Twilight's Hammer clan infiltrated Ulduar and weakened Yogg-Saron's chains that the entity's influence on the Keepers increased, becoming strong as iron. Yogg-Saron commanded Loken to create a new army from the Forge of Wills. In Loken's hands, the forge churned out legions of iron dwarves and vrykul who sought only bloodshed and war.

Wrath of the Lich King
In Howling Fjord, the iron dwarves attacked the Explorers' League at Ivald's Ruin and took control of Baelgun's Excavation Site. During the infiltration of the Explorers' League, they received orders of Loken: They had to bury the fissures now in order to make silent and blind the earth.

The Grizzly Hills rune-smiths subjugated the Stone Behemoths and set them on the path of Ulduar to free their Father. In addition, the dwarves craftsmen constructed the war golem to stop the stone giants. However, the dwarves of Dun Argol, led by Iron Thane Furyhammer, started a war with the Horde. They won the first fight against them thanks to their iron golems. However, they have been defeated when their creations turned against them. Moreover, Thor Modan was besieged by the stone giants. Taking advantage of the siege, the Horde stole and killed many iron dwarves in the capital. Later, they fell under the attack of stone giants and earthen with the death of many iron dwarves and their leader, Iron Thane Argrum.

In the Storm Peaks, the iron dwarves took the Forge of Wills, Loken created an even larger army from scratch, and expelled the earthen from Ulduar.

A party of them was looking for Norgannon's Core. They started by tracking Brann Bronzebeard into the frostborn territories, declaring war with them. Later, they assaulted the Frigid Tomb and the Foot Steppes but were stopped by the frostborn. Finally, they killed the keeper, Creteus, but didn't obtain Norgannon's Core.

An other party, led by Valduran the Stormborn, was at war with the Dolomite Giants in Snowdrift Plains. In addition, they used three forges to construct an Iron Colossus. A coalition of adventurers and earthen defeated them and killed Valduran. Overseer Narvir stole The Heart of the Storm and gave life to the Iron Colossus. However, their creation has been defeated thank to jormungars' acid.

Ulduar
The iron dwarves were part of Ulduar's "primary defensive emplacements". Moreover, they occupied the Antechambers of Ulduar in order to defend the Iron Council. So, they defended Ulduar during the siege and helped Razorscale to fight the adventurers. Many of them have been defeated during the invasion of Ulduar and their delegate inside the Iron Council, Stormcaller Brundir, has been defeated.

Legion
By the time of the Burning Legion's third invasion of Azeroth, the iron dwarves have been integrated into Ulduar's defensive systems, serving the Keepers alongside the earthen and the mechagnomes. When Odyn attempted to unify the titan-forged, they were defending Ulduar against the demons. After the end of the siege, Dvalen Ironrune joined the Valarjar alongside the Battlelord.

Groups

 * Stormforged
 * Dark Rune
 * Iron Rune

Territories

 * Baelgun's Excavation Site, Howling Fjord
 * Giants' Run, Howling Fjord
 * Dun Argol, Grizzly Hills
 * Thor Modan, Grizzly Hills
 * Halls of Lightning wing of Ulduar, Storm Peaks
 * Halls of Stone wing of Ulduar, Storm Peaks
 * Narvir's Cradle, Storm Peaks
 * Nidavelir, Storm Peaks
 * Ivald's Ruin, Howling Fjord

Trivia

 * Players can turn into an iron dwarf using Iron Boot Flask.