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Raid · 10 and 25 players

Ulduar

The titan city and prison of Yogg-Saron: fourteen bosses, hard modes triggered mid-fight, Algalon behind a key, and the legendary Val'anyr.

Advanced5 min readUpdated 25.09.2026

Raid Overview

An ancient titan city in the Storm Peaks, where Yogg-Saron is awakening. The largest raid in WotLK: fourteen bosses, many of them with their own “hard mode” that you trigger mid-fight for better loot.

Entrance
The Storm Peaks, north
Group size
10 or 25 players
Modes
normal and boss hard modes
Reset
weekly — Saturday at 07:00 Moscow time (MSK, UTC+3)
Bosses
14 — from Leviathan to Algalon
Loot
ilvl 219–239, Emblems of Conquest
Partial group? No problem
Raids on Valor scale to the number of players: you can go in with a partial group — enemy health and damage will be reduced. Short on people? A 10-player raid can take up to 6 companion bots, a 25-player raid up to 17.

How to Get There

  1. The Storm Peaks

    Ulduar is in the northern part of the Storm Peaks, beyond the Temple of Storms. The entrance is a portal at the foot of a huge staircase.

  2. The Siege of Ulduar

    The first fight is in vehicles against Flame Leviathan. After that, the path branches off toward the Keepers.

Bosses

The Siege of Ulduar

1. Flame Leviathan

vehicle fight
  • The raid boards siege engines, demolishers, and choppers. Leviathan pursues one vehicle — that vehicle runs.
  • Knock out its cannons and turrets, and “overload” the machine with passengers. The more Keeper towers you leave intact, the harder the fight and the better the loot.

2. Ignis the Furnace Master

the smith
  • The tank drags the Iron Constructs through fire so they soften, then through water so they shatter.
  • Flame Jets interrupt spellcasting. Slag Pot — the player in the pot needs heavy healing.

3. Razorscale

dragon in the sky
  • While she's in the air, the engineers repair the harpoons. Four harpoons bring her down to the ground — then the whole raid attacks.
  • Don't stand in Devouring Flame pools. At 50% she lands for good; Fuse Armor — swap tanks.

4. XT-002 Deconstructor

mechanical toy
  • Gravity Bomb and Searing Light — the marked player moves away from the raid.
  • Tympanic Tantrum hits everyone and stuns. When the heart is exposed, attack it; destroying the heart activates hard mode.
The Antechamber of Ulduar

5. The Assembly of Iron

Steelbreaker, Molgeim, Brundir
  • Three bosses at once; each one you kill empowers the rest. Whoever dies last determines the loot: Steelbreaker last means hard mode.
  • Brundir: Overload — run away; Lightning Whirl — interrupt. Molgeim: stand in the Rune of Power, get out of the Rune of Death.
  • The Assembly drops the Archivum Data Disc — the start of the quest chain leading to Algalon.

6. Kologarn

stone giant
  • The right arm grabs players — attack the arm to free them. The left arm hits with a shockwave.
  • Focused Eyebeams follow a player — lead them away from the raid. The loot is in a chest.

7. Auriaya

keeper of beasts
  • Sentinel Blast — must be interrupted. Terrifying Screech fears the raid.
  • Sonic Screech is split among everyone standing in front of her — stack up. The Feral Defender resurrects nine times.
The Keepers of Ulduar

8. Hodir

Keeper of Frost
  • Flash Freeze — stand on a snowdrift or you'll be frozen. Biting Cold — keep moving so you don't build up stacks.
  • Free the helpers from the ice — they grant buffs. Kill him within three minutes for hard mode and a rare chest.

9. Thorim

Keeper of Storms
  • The raid splits up: some hold the arena, while others go through the trap-filled corridor to Thorim's throne.
  • Chain Lightning — spread out. Get down to him while Sif is still alive — that's hard mode.

10. Freya

Keeper of Life
  • Three waves of adds: ancient spirits, tree guardians, and lashers. Each wave causes trouble in its own way — kill each one completely.
  • Nature Bombs and Sunbeam — move out. Leave the Elders alive for hard mode and the best loot.

11. Mimiron

Keeper of Invention
  • Four phases: Leviathan Mk II, VX-001, the Aerial Command Unit, and all three together.
  • Shock Blast — run away; Plasma Blast — hits the tank, healers get ready in advance. Laser Barrage — get out of the line.
  • The big red button in the room activates hard mode, with fire all over the floor.
The Descent into Madness

12. General Vezax

herald of Yogg-Saron
  • Aura of Despair shuts off mana regeneration — conserve your mana.
  • Searing Flames — interrupt. Mark of the Faceless — the marked player moves away. Dodge Shadow Crash.
  • Don't touch the Saronite Vapors — a Saronite Animus will appear, and that's hard mode.

13. Yogg-Saron

Old God
  • Watch your Sanity: lose all of it and you go over to the enemy's side.
  • Phase 1: Sara and the clouds — don't touch the clouds, guardians spawn from them. Phase 2: tentacles and portals into the visions — a group goes inside to attack the brain.
  • Phase 3: Lunatic Gaze — turn away. The Keepers help you; the fewer you take along, the harder it gets. Zero Keepers on 25-player — Mimiron's Head.
Celestial Planetariumkey required

14. Algalon the Observer

envoy of the titans
  • The Planetarium door is opened by the Celestial Planetarium Key — the reward for the quest “Algalon”. The chain begins with the “Archivum Data Disc”.
  • Big Bang — hide in the black holes left behind by fallen stars. Cosmic Smash — move away from the impact point.
  • You get one hour for the fight, counted from the first attempt.

Loot

ModeItem levelPer boss
10 playersilvl 219, hard modes up to 232; Algalon 2262 Emblems of Conquest
25 playersilvl 226, hard modes up to 239; Algalon 2392 Emblems of Conquest

Bosses drop T8 set tokens. On 25-player they also drop Fragments of Val'anyr for the legendary hammer; Mimiron's Head drops from Yogg-Saron on 25-player with no help from the Keepers.

Tips

Hard modes — one at a time

Start with normal Ulduar. Each boss's hard mode is activated separately.

Sanity on Yogg-Saron

The key mechanic of the final fight is not going insane. When in doubt, leave the vision.

Time for Algalon

Algalon's one-hour timer starts with the first attempt — don't open him at the end of the evening.

The legendary hammer

Fragments of Val'anyr are collected only on 25-player.

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