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Ulduar

The Assembly of Iron Guide

The Assembly of Iron in Ulduar, quoted from the Adventure Guide. Database holds the raw abilities and the full loot table.

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30-second TL;DR

Adventure Guide says

  • Defeating a member of the Assembly of Iron will heal the remaining two to full health and grant them Supercharge, which increases damage and grants access to additional abilities.
  • Stages named in the Adventure Guide: Hard Mode.
  • Tanks: Fusion Punch inflicts heavy Nature damage.
  • Healers: Avoid Stormcaller Brundir to minimize damage taken from Overload and Lightning Tendrils.
  • Damage dealers: Avoid damaging Runemaster Molgeim while he has Shield of Runes.

Overview

Adventure Guide says

Defeating a member of the Assembly of Iron will heal the remaining two to full health and grant them Supercharge, which increases damage and grants access to additional abilities.

Encounter phases

Adventure Guide says

  1. Hard Mode Defeating one of the Assembly of Iron buffs the remaining members with Supercharge. Steelbreaker is the most difficult member of the Iron Assembly if he is the last member of the Assembly standing.

Tank mechanics

Adventure Guide says

Healer mechanics

Adventure Guide says

DPS mechanics

Adventure Guide says

Boss abilities

AbilityAdventure GuideNotes
Chain Lightning
Overload
Lightning WhirlOnly available when under the affect of Supercharge.
Lightning TendrilsOnly available with 2 stacks of Supercharge.
Shield of Runes
Rune of Power
Rune of DeathOnly available when under the affect of Supercharge.
Rune of SummoningOnly available with 2 stacks of Supercharge.
Lightning BlastOnly available with 2 stacks of Supercharge.
High Voltage
Fusion Punch
Static DisruptionOnly available when under the affect of Supercharge.
Overwhelming PowerOnly available with 2 stacks of Supercharge.
MeltdownOnly available with 2 stacks of Supercharge.
Electrical ChargeOnly available with 2 stacks of Supercharge.
Supercharge
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Loot

Every name is a TheWoWDB item page. Hover the row for the first-party tooltip.

Fragment of Val'anyrAncient Iron HeaumeNAncient Iron HeaumeTWBelt of Colossal RageNBelt of Colossal RageTWBelt of the Crystal TreeNBelt of the Crystal TreeTWBelt of the Iron ServantNBelt of the Iron ServantTWBoots of the Petrified ForestNBoots of the Petrified ForestTWCirclet of True SightNCirclet of True SightTWCloak of the Iron CouncilNCloak of the Iron CouncilTWDrape of Mortal DownfallNDrape of Mortal DownfallTWDrape of the LitheNDrape of the LitheTWFang of OblivionNFang of OblivionTWGreaves of Iron IntensityNGreaves of Iron IntensityTWGreaves of Swift VengeanceNGreaves of Swift VengeanceTWHandguards of the EnclaveNHandguards of the EnclaveTWInsurmountable FervorNIron-Studded MantleNIron-Studded MantleTWLady Maye's Sapphire RingNLeggings of Swift ReflexesNLeggings of Swift ReflexesTWLoop of the AgileNOverload LegwrapsNOverload LegwrapsTWPerilous BiteNPerilous BiteTWPhaelia's Vestments of the Sprouting SeedNPhaelia's Vestments of the Sprouting SeedTWRadiant SealNRaiments of the Iron CouncilNRaiments of the Iron CouncilTWRaptureNRaptureTWRuned Ironhide BootsNRuned Ironhide BootsTWRune-Etched NightbladeNRune-Etched NightbladeTWRuneshaper's GlovesNRuneshaper's GlovesTWRunetouch WristwrapsNRunetouch WristwrapsTWSapphire Amulet of RenewalNShoulderpads of the IntruderNShoulderpads of the IntruderTWSteelbreaker's EmbraceNSteelbreaker's EmbraceTWStormrune EdgeNStormrune EdgeTWStormtipNStormtipTWThe MasticatorNThe MasticatorTWUnblinking EyeNWatchful Eye of FateNRuned OrbStormforged Rune

Mounts, toys, achievements, transmog

Only rows the journal loot table or an achievement title can prove for this encounter.

Mounts

Mimiron's Head

Entrance and instance

Ulduar is a raid in the Adventure Guide. See the Ulduar database page for the raw journal, map, and loot grid. This guide does not invent coordinates or a walking path.

Flame Leviathan
Ignis the Furnace Master
Razorscale
XT-002 Deconstructor
Kologarn
Auriaya
Hodir
Thorim
Freya
Mimiron
General Vezax
Yogg-Saron
Algalon the Observer

Player strategy

This page quotes the Adventure Guide. It does not add player strategy such as positioning, assignments, stack or spread calls, or cooldown timings unless that sentence is already in the journal.

Questions

What does the Adventure Guide say about The Assembly of Iron?

Defeating a member of the Assembly of Iron will heal the remaining two to full health and grant them Supercharge, which increases damage and grants access to additional abilities.

How many abilities does The Assembly of Iron have?

The current datamine lists 16 named abilities on the The Assembly of Iron encounter.

What does The Assembly of Iron drop?

The Adventure Guide lists 68 drops. Each name links to its TheWoWDB item page. The full table also lives on the Ulduar database page.

Does The Assembly of Iron change on Heroic or Mythic?

The current Adventure Guide text for this encounter does not include separate Heroic or Mythic sentences we can quote. If a later client build adds them, they appear here automatically.

Does The Assembly of Iron drop a mount?

The journal loot table includes Mimiron's Head. Each links to its TheWoWDB mount page.

Where does this guide's text come from?

Quoted Adventure Guide sections come from TheWoWDB's retail datamine (client build 12.1.0.69587, ingested 2026-09-01). Player strategy such as positioning, assignments, and cooldown timings is omitted unless that sentence is already in the journal.

Source and build

This page quotes the Adventure Guide. It does not add player strategy such as positioning, assignments, stack or spread calls, or cooldown timings unless that sentence is already in the journal. Quoted sections come from TheWoWDB Adventure Guide datamine (client build 12.1.0.69587, ingested 2026-09-01). Ability names link to first-party spell pages. When a newer retail build is ingested, this page updates with it.