The Osmic Fragment from the Wellspring seems to have a stronger pulse than the others.

Did the Scorn's temporary possession have an effect? Or is the resonance amplified by the nearby presence of the other fragments?

More importantly, do the Scorn know what Immaru intends to do with the Osmic Fragments? They must. If they know the runes are for some kind of Lucent Brood defense, then the Osmic Fragments are undeniably part of that.

It would help if you knew the runes' specific purpose. You glance at the Hidden's open query. No progress yet.

In the meantime, there are other angles of this case to consider. Check the other Hidden reports for more leads.