Aggyathat

A darkness watcher over our world. No one knows it's full goals, but whatever they may be, it does not seem to want us to live.

Darkness Incarnate
Aggyathat is one of the greatest threats to the Land of Souls. It is one of the primary rules of the Shadow, and has over and over again attacked our lands. Cities and nations have fallen to the beast and it's followers have slain countless. Aggyathat dwells in the Peaks of Jsain, roaming over the mountains. It is tended to and followed by its cultists and an assortment of otherworldly beasts, mostly Daemons and Shadow Walkers, who she created along with many other otherworldly beasts. It also has a love of knowledge and can actually be talked to. Despite it's well deserved reputation, many have gone to the Darkness itself in order to trade knowledge, although if the person who wishes to trade gives it something it already knows, things usually don't go too well for them. Aggyathat's form remains a mystery, as it's body is cloaked by impenetrable darkness. No light can pass through this and even the greatest goblin vision cannot break through the shadows. The Darkness has hinted at it's appearance, though. Massive, body arms with clawed hands with two thumbs, one on either side, stretch out from the darkness and drag many into it. Few are ever seen again.

Creator of the Shadow Beasts
Those horrid things we know as Shadow Beasts are actually the spawn of Aggyathat. Many creatures have been made out of the Pure Darkness that comes from Aggyathat. These creatures include Daemons, Shadow Stalkers, Lighteaters, Uufgis, Shadow Wraiths, Shades, Stygian Doubles, and more. Not all of these creatures came directly from Aggyathat, but Aggyathat is the greatest and first ever source of Pure Darkness, which these creatures are made of.

Nemesis of the Light
Aggyathat and the Light have been fighting one another for centuries. Aggyathat is the essence of darkness, and the Light is the exact opposite. They are two equally dangerous and cruel forces, locked in combat for years to come. It is believed by some that Aggyathat may only be attacking our world to remove the Light's influence on our plane. This comes from the fact that it focused on our world shortly after the light did, that they already knew of the other's existence (and already hated each other), and that Aggyathat and it's forces will ignore all other creatures in order to kill servants of the Light.