For the Normal mode version, see  [Archivum Data Disc].

The Archivum Data Disc starts the Algalon the Observer attunement quest chain in Heroic mode Ulduar.


This item is a reward for completing the Assembly of Iron encounter. Only one player can acquire it per lockout period.

The disc is a guaranteed drop so long as Runemaster Molgeim or Steelbreaker is killed last (Medium difficulty and Hard mode, respectively).

As a quest objective

This item starts N [30R] Heroic: Archivum Data Disc.

Patch changes

External links