One of many apparently useless Precursor relics obtained by the Druuge from the Utwig in exchange for the Ultron. The Utwig, using the Ultron's own power, predicted that in this storehouse of unidentifiable, unusable Precursor relics they had accumulated would be hidden the secret of changing and purifying the racial nature of the Druuge, and gave them these relics as a charitable act. The Druuge, angry at being cheated of their truly sought prize, the incredibly powerful Precursor bomb the Utwig had found, proceeded to unload as many of these relics on foolish travelers as they could.
The Glowing Rod was a large, staff-shaped cylinder that constantly emitted a constant, flickering pattern of light from its entire surface. However, this light pattern has no particular special properties, and the device simply generates light by drawing on the current of a source of electrical current hidden in a secret compartment (the Druuge provided a set of standard batteries as a power source). Though scientists cannot be certain, it seems probable that the Precursors only built the Rod as a toy or curiosity.