Ca'Tarain

Ca'Tarain is said to be one of the oldest deities still alive, with only Duroth the Allfather known to be guaranteed older than him. Ca'Tarain was born when the first mortal killed another mortal for selfish gain.
=== Biography ===
Little is known about the circumstances of Ca'Tarain's creation, with Duroth the Allfather being the only one able to shine light on that time. In his words, a set of twin brothers left the The World Spring is in search of new land to establish a mountain hold on. They led their clan on the expedition and found the Pearl Mountain. A mountain of purest white. The brothers began their digging efforts but disagreed on the future of their hold. 
One of the brothers, Ardeth Marblebeard, began to carve the peak. He argued that the mountain's beauty is rivalled only by the stars and that they should carve the most beautiful hold to impress the world both from within and the outside.
The other brother, Taraleth Marblebeard, began to carve the base of the mountain. He argued that the world was dangerous. The Pearl Mountain would attract much attention, and the dwarves would have to defend it to keep it for themselves. He sought to build defensive ramparts and towers, protecting the mountain and its treasure.
The clan was split between the brothers, and neither made good progress in their efforts. Ardeth proposed a contest of strength to determine which plan to go forth with. Taraleth agreed, and after the arena was set up, the two brothers entered a wrestling match. After a long struggle, Ardeth just barely managed to defeat his brother and stood victorious. After a short celebration, he reached down and offered his brother his hand to help him up. Taraleth, overcome with emotions of greed and ambition, stood up and pushed his brother over a nearby cliff, sending his brother to his death.
In the moment of Ardeth's death, Ca'Tarain was born. Taraleth and his clan went on with his plan and established the Mountainhold of Tarain. It would grow and even prosper for a while, but soon an ailment would take hold. The dwarves of Tarain grew evermore greedy, jealous, and ambitious.
Eventually, no more news would reach the capital of Kuh'Karakzath. Worried, Duroth the Allfather set out with his companions to Tarain. He reached the hold and entered it alone. He remained within its hold for one day, and when he left he ordered its gates forever sealed shut.
When asked what he found, he is said to have responded."None shall speak of this place. Let none enter its accursed halls. What was done here can never be undone. Taraleth Marblebeared has poisoned all of mortal kind and we shall never rid ourselfs of what he unleashed. No longer shall we freely enjoy peace. Now we must pay and attone, forever more we must labour continiously to stop this corrpution from undoing all that was achieved."Today, little is known of Ca'Tarain. Most don't know he exists and of the few that do, few pay him much attention. It is thought that he lives within each and every mortal born being, subtly changing their perception. He whispers into the ear of the ambitious, the desperate and the wronged. He turns even the most kind-hearted into murders and killers for what they claim to be peace. Most cruel; as someone is exposed to more and more death, even if not at their own, they begin to accept it as a natural part of life.
As he grew in power, murder, assassination, war, and extermination; mortals began to rationalize all of them, and today killing fellow mortals is often only one excuse away from being celebrated. Something that Duroth the Allfather laments to this day and something that his most ardent worshippers claim his the reason for his departure to the moon, to build a new society free of Ca'Tarain's poison.