A researcher needs the Obelisk of Karza to help with the Crucible project. Recover it from the Hades Nexus and deliver it to him in the Presidium Commons.
Listen to the researcher with a datapad sitting at the Courtyard in Presidium Commons. He is between Points of Interest 3 and 4. He is seeking an artifact containing Prothean language translations.
The Hades Nexus sector will be accessible on the galactic map after completing Priority: Rannoch
mission. Scan the moon Kopis
from the Hoplos
system in the Hades Nexus cluster.
After handing over the artifact, you will gain 5 Reputation, 15,000 credits and an update to the Alliance Engineering Corps War Asset.