Call of the Void

It is said that if you stare into the darkness long enough, the darkness stares back. The truth is much darker, literally. It molds into you, becomes the voice in your head, the Call of the Void made manifest. It seeps out from the darkest corners of the earth, and crawls into the innermost sanctums of your mind. It is your pain, fear, love, hate, lust, and sloth. It devours your very sense of being. So, when you hear the night call, and you find it staring, run.

Summary

If the Perverse were Paga's Joke, then the Call is her weapon. Created with the singular purpose of destroying Invicus' creations. The Call is a foe to be reckoned with. The Call is the reason why, creatures are afraid of the dark. It is what inspires them to fear the coming of the night. For no matter how bright their, light. It will call to them all the same...
The first indication of their presences is a added depth to the darkness, like the drop off of a reef. Second a tangable aura forms in the air. Third voices of from the dark luring the victim into the night. Four corruption, and death of the creature.
Once enough victims have been claimed the void wages a more direct form of abduction. The consuming dark falls upon unsupsecting victims, whom are torn apart by the warriors within. Some theories indicate that they were once world eater minions, but those accounts often go unsupported.

Historical Basis

Aside from rumor's of its participation in the World Shattering. The Call was first truly encountered by the Kazor Clan legions during the wars of conquest. Trapped in an ancient mine, waiting for souls to claim, the Call attacked the legionaries. The war that was fought in the endless dark was brutal, and prolonged. Even for the superior sight of the dwarves found the darkness difficult to see in. The Kazor clan established a fortification at the entrance of the accursed place, and ensures that those corrupted are put down, and breaches are sealed, so the evil cannot escape.