Void shard

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

Overview
Amon deployed several Void shards on Aiur around the Overmind's carcass. The shards drained life from the land around them to feed Amon's host body as it prepared to awaken.

Game Structure
Void shards appear only in the mission "The Host" where destroying them is the main objective to win the mission.

Void shards generate a large field of Void energy around them, causing all units that enter it to take damage over time. The void shards also generate portals to the void when attacked that spawn enemies to defend it. When attacking a Void shard, concentrate on destroying it instead of the enemies spawned; the shard's destruction will stop the enemy forces from reinforcing their numbers and will eliminate the field of Void energy damaging the player's units.