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- Main article: Star Augur Etraeus
Thing That Should Not Be is a faceless one located in the Nighthold, summoned in phase 4 of the Star Augur Etraeus boss encounter.
- Void Empowerment - Increases damage dealt by 200%.
- Void Shift - When a Thing Which Should Not Be is too close to Astromancer, Astromancer's damage taken is reduced by 99%.
- Witness the Void - Shows the horror of the void to players, inflicting 396000 to 461000 Shadow damage to all players and fearing any players looking towards the caster for 8 sec sec.