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Tz'Arrm, Helm of the Emperor is the capital of the hobgoblin empire of the Iron Authority on the southern tip of Tal'Dorei.[2]


The palace of the Iron Emperor is the thirty-foot tall helm dropped by the Betrayer God Bane, the Strife Emperor, when he fell in battle against Melora in the Calamity. Likewise, the rest of his pitted iron armor has gradually been chiseled and melted down to produce the walls of the city, weapons, and more.[3]


Most humanoid races, including the goblins and slaves, find Tz'Arrm swelteringly hot, though it suits the hobgoblins fine. (Tieflings are prized as slaves because they can stand the heat.) The climate is tropical, but dry up on the Beynsfal Plateau, and the iron walls of the city work together with the black stone of the plateau to trap the heat.[3]



A hobgoblin as depicted in D&D: Monster Manual, page 187.[art 2]

The Iron Authority is extremely hierarchical and regimented, with each person knowing their place exactly: whom they serve, and who serves them. This structure is promoted by constant, stirring propaganda and enforced by numerous secret police. Seventy percent of the population are hobgoblins. Another one-tenth of the population are goblins living as second-class servants. The remaining one-fifth of the population are other races captured as slaves in the Authority's wars of conquest; the slaves are generally laborers used to chip iron scraps from Bane's fallen armor or forage for food in the jungle, since the Beynsfal Plateau has been devoid of plant life since the cataclysmic battle that felled Bane. While tieflings are valued as slaves for their ability to handle the heat (including work in the furnaces),[3] elves are highly desired for their beauty, long life, and the difficulty of acquiring them in the hostile jungle.[4]


  • In 812 PD, as both Emon and Westruun recovered from being occupied in the Chroma Crisis, Tz'Arrm edged out Kraghammer as the second-largest city on Tal'Dorei after Emon.[5] By 836 PD, Tz'Arrm's population was exactly the same as 24 years earlier, but both Kraghammer and Westruun had seen population booms and eclipsed Tz'Arrm.[6]


  1. See Tal'Dorei Campaign Setting Reborn, p. 119.
  2. See Tal'Dorei Campaign Setting, p. 76.
  3. 3.0 3.1 3.2 See Tal'Dorei Campaign Setting, p. 79.
  4. See Tal'Dorei Campaign Setting Reborn, p. 120.
  5. In 812 PD, Tz'Arrm had a population of 47,400, a distant second even to the recently devastated Emon, which had 287,550. But it was still greater than Kraghammer's population of 43,550. See Tal'Dorei Campaign Setting, p. 79. See also pp. 58, 65, and 88.
  6. See Tal'Dorei Campaign Setting Reborn, p. 119. See also pp. 89 and 96.


  1. Official map of Tz'Arrm and the Iron Authority's location in the Rifenmist Peninsula, by Andy Law from Critical Role: Tal'Dorei Campaign Setting. This file is a copyrighted work. Its use in this article is asserted to qualify as fair use of the material under United States copyright law.
  2. DDB Hobgoblin on D&D Beyond. This file is unofficial Fan Content permitted under the Wizards of the Coast Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC.