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A titan hall in Ulduar around a figure of glowing blue light

The Heroic Celestial Planetarium Key — Attunement · Ulduar · WoW WotLK

Requiredin this game version
Opens
Ulduar
Steps
4 steps
Quests
7 quests
Reputation
None
Factions
Same route for both

Earn the key to the Celestial Planetarium, where Algalon the Observer waits in the 25-player Ulduar, by beating the four Keepers on hard mode.

Requirements

Level 80 and a 25-player Ulduar raid able to beat the Assembly of Iron on medium or hard mode and Freya, Hodir, Thorim and Mimiron on hard mode.

When it applies

Algalon's chamber in the 25-player Ulduar opens for the raider holding the Heroic key.

Step-by-step checklist

Progress is saved on this device. Finish each step to unlock the next.

  1. 1. Find the Celestial Planetarium

    Prospector Loren at the Archivum asks you to locate the entrance to the Celestial Planetarium.

    Heroic: The Celestial Planetarium Level 80+ · Both factions

    Starts:

    • Prospector Loren

  2. 2. The Archivum Data Disc

    Defeat the Assembly of Iron on medium or hard mode, with Steelbreaker or Runemaster Molgeim falling last: the last one drops the Archivum Data Disc. Bring it to the Archivum Console.

    Heroic: Archivum Data Disc Level 80+ · Both factions

    Requires: Heroic: The Celestial Planetarium

    Objectives: 1 × Archivum Data Disc

    First complete: Find the Celestial Planetarium

  3. 3. The Keepers' sigils

    Defeat Freya, Hodir, Thorim and Mimiron on hard mode for their sigils (the Archivum Console describes each), and hand each one to Prospector Loren.

    Heroic: Freya's Sigil Level 80+ · Both factions

    Starts:

    • Prospector Loren

    Requires: Heroic: The Celestial Planetarium

    Objectives: 1 × Freya's Sigil

    Heroic: Hodir's Sigil Level 80+ · Both factions

    Starts:

    • Prospector Loren

    Requires: Heroic: The Celestial Planetarium

    Objectives: 1 × Hodir's Sigil

    Heroic: Thorim's Sigil Level 80+ · Both factions

    Starts:

    • Prospector Loren

    Requires: Heroic: The Celestial Planetarium

    Objectives: 1 × Thorim's Sigil

    Heroic: Mimiron's Sigil Level 80+ · Both factions

    Starts:

    • Prospector Loren

    Requires: Heroic: The Celestial Planetarium

    Objectives: 1 × Mimiron's Sigil

    First complete: The Archivum Data Disc

  4. 4. Algalon

    Bring the Sigils of the Watchers to the Archivum Console for the key. The raider holding it opens the Celestial Planetarium to Algalon the Observer.

    Heroic: Algalon Level 80+ · Both factions

    Starts:

    • Prospector Loren

    Objectives: 1 × Sigils of the Watchers

    Rewards

    Heroic Celestial Planetarium KeyLarge Sack of Ulduar Spoils

    First complete: The Keepers' sigils

0/4 steps complete.

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