A psionically volatile nebula at the edge of the Cinder Marches where reality tears and reknits — the deeper you go, the more the Chroma distorts. Ships that venture too far sometimes come back changed, if they come back at all.
The Sundering is the Cinder Marches' final boundary — a nebula cloud where the Chroma doesn't merely fade but fractures, producing frequencies that exist nowhere else in the galaxy. The phenomena intensify with depth: shallow layers cause psionic hallucinations and instrument failure, mid-level exposure induces permanent personality shifts, and the deepest regions are simply gone — blank spots on every sensor, where space itself seems to have been edited.\n\nShips that enter the deep Sundering and return are rarely the same. Crews report alternate memories — lives they never lived, decisions they never made. Some return speaking in harmonic patterns that match no known Chroma frequency. A few come back with abilities they did not have before.\n\nThe Dissonant Choir sends its most devoted into the Sundering as an initiation rite — those who return are considered reforged. The Bureau has quarantined the entire nebula under a Frequency Integrity edict, but enforcement is impossible this far from the Halo. The Sodality of Drifters knows safe lanes through the shallower edges and charges handsomely for the passage.