Having your droid scan fallen enemies, ancient technology, or local flora.
The Codex suggests that the Zeffo may have traveled to Dathomir and influenced the culture there, or perhaps fell to the dark influence that already resided there. This creates a deep timeline connection: The fall of the Zeffo provided the dark side energy that would eventually empower the Nightsisters. It ties the game’s disparate locations (Bogano, Zeffo, Dathomir, Kashyyyk) into a singular narrative of dark side contamination spreading across the galaxy over millennia.