In the open world of Cambion Drift, a planet on Deimos, Vome and Fass Residue can be found at various locations. Complete the Heart of Deimos quest to access it. After completing it, check Cambion Drift for Vome and Fass. On one side of the map, Vome is the gigantic blue worm, while on the other, Fass is the orange worm. The opposite residue appears on the map when someone is out (for example, if Fass is out, Vome’s residue appears).
Identify the large zones on the map with glowing mists to locate this residue. Vome is blue, while Fass is orange to share each worm’s color. You can award residue by shooting small globs of their residues. To complete the Nightwave challenge, you must find 15 of these across the surface and return to the Necralisk. For residue spawns to be reset, you’ll need to visit the Necralisk and Cambion Drift.