Void chasm

Void chasms are NPC structures in StarCraft II: Legacy of the Void.

Game Unit
Void rifts appear in the final mission "Amon's Fall." Amon's forces will continually spawn from them. Attacking them will cause more forces to spawn, along with constructs. 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.