The subject of this article or section was part of the Scourge Invasion, a world event that heralded the opening of Naxxramas in patch 1.11 or for the opening of Northrend. Once the world event has run its course, this will no longer be available.

Killing undead mobs spawned around a Necrotic Shard (which is green) will reduce its health. At around 1% health it will turn into a Damaged Necrotic Shard (which is blue) and 4  Cultist Engineers will spawn around the shard and begin channeling magenta energy streams to the shard. If you talk to the Cultist Engineers, you can trade 8 to kill one and spawn an elite  Shadow of Doom.

When all the Shadows of Doom are killed, the Damaged Necrotic Shard will despawn.

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