Void chasms appear in the final mission "Amon's Fall." Amon's forces will continually spawn from them. Attacking them will cause more void shades to spawn, along with constructs. When their health is depleted, chasms will temporarily shut down. They cannot, however, be permanently destroyed. As the mission continues, void chasms will appear across the map and in larger numbers. They can be seen before they finish forming, but cannot be attacked.