The complementary resonance led you to three resonant Hive runes, fiercely protected by the Lucent Brood. From there, Ghost was able to lock onto the signal of a nearby Osmic Fragment, which led directly to your prime suspect: Immaru, Savathûn's Ghost.

What could he be planning with these Osmic Fragments? How do the resonant Hive runes fit in? Is this where the connection to the Relic lies?

You step back and stare at the empty space on the board. Soon, it'll be filled with evidence.

Report back later for further developments.