The Blackguard of Edrin Theoril

After his service under the Heroes, he sought to cut ties from his own lineage and gave himself the pseudonym Edrin Theoril.

His Efforts in The Battle Against Godking Faust

Before he was Edrin Theoril, he was the Theodrin Ethril, uncle of Valik Ethril, one of the founders of The Heroes Guild. Under the command of the Three Heroes, Theodrin Ethril sought the demise of the Godking Faust of Cenodoxia; his mission saw his routing and slaying monstrous forces as well as scouting for magical artifacts.

The Miracle of Death

It is said that Theodrin Ethril station himself in a fort to prevent a host of undead to join with the Godking's army. They were sure to be outnumbered and with no magical means of ensuring the undead returned to their inanimate state, Theodrin Ethril and his army of 500 men and women would be little more than a light obstacle in the way of the undead wave. Certainly, the army granted to him was so small as to both maximize their efficiency, but limit the numbers that would join the ranks of the dead.
So, for five days and five nights, Sir Theodrin confined himself to a sanctuary within the fort, not to be disturbed until the arrival of the undead forces; there, he bade the gods and all goodly spirits who would hear him; he prayed for any means with which to slay the undead. Each day, he was visited and was tested.

On the first day, his steward brought him food and water.
The first meal came in the morning. The Steward placed the meal beside Sir Theodrin. When Sir Theodrin stopped praying to eat, he turned to see a black moth on his plate and crumbs of the food in its place. Sir Theodrin, frustrated, resumed praying.
The second meal came at noon. The Steward placed the meal beside Sir Theodrin and covered it, as asked by Sir Theodrin. When Sir Theodrin however, stopped praying and uncovered the food, he noticed the black moth there again, to see the food had rotted. Sir Theodrin, in fear, resumed praying
The third meal came at night. The Steward placed the meal beside Sir Theodrin, but left it on the floor, as asked by Sir Theodrin. Theodrin did not stop to eat, and when his steward returned for the plate, Theodrin asked that he not bring anymore food or drink. The Steward nodded, and whisked away.
"You are a clever boy." Came a voice. "Perhaps clever enough, but greedy still. -- You will await my brothers and sisters, and our reckoning will be just. We shall either give you what you seek, or take you with us in five days time."

— "Commander Theodrin Ethril's Final Stand" By Steward Godrig Aberlas

On the fifth day, It is said that Sir Theodrin left the room in a hurry, carrying odd items which he threw into his blacksmith's furnace. He closed the door, and on the eve of battle, he reached in to pull out a Morningstar. His forces rode into battle and slew the undead army. Soon after, Sir Theodrin sent the weapon to his nephew, Valik Ethril, in hopes it would lend him aid.
When the weapon slew even the Godking Faust, the weapon soon after became known as The Twelve Arms of Death. While it was promptly returned to Sir Theodrin, he then abandoned his name, and is quoted in regular texts saying:

I gave that name to the Gods of Death so that I may walk forward unshackled from mortal greed. I will give of myself, my bones, my limbs, in service to those who will walk over from this new horizon.

These words alongside his works as Edrin Theoril later inspired his Steward to write several books on this event and many others.

Edrin's Service to Ievlen

Edrin Theoril, as he was then and now called, became a religious figurehead, or Patriarch, of a warrior death cult, at first, using The Twelve Arms of Death to slay undead. This weapon was later retired and handed off assumedly to Edrin's chosen successor, but this is yet uncomfirmed.
What Edrin did, however, was set the groundwork for The Blackguard to be created, a force of militiamen who were trained strictly as monster hunters and mage slayers. This was a great boon after the fall of the empire of Cenodoxia and the refounding of the city as Ievlen. As the government began to reestablish itself, the people could thusly focus on who would be a better leader and ruler than the attacks they began then to suffer due to an unchecked border.
One of Edrin's greatest and last victories was in slaying the Palewood's oldest Wendigo with The Twelve Arms of Death, before passing away a few months after.
This created the culture of the Ievlen Empire to date, as many of the present day people are magic fearing and abhor all forms of monstrosities. In fact, the ruling title of the Ievlen Empire is called a "Patriarch" with the wife taken being a "Matriarch".

The Death of Sir Edrin Theoril

At the age of sixty-three, Theoril died. After his battle with the Palewood Wendigo, his strength seemed sapped. It is thought that with no undead within the Ievlen Empire to slay, the weapon began to siphon and consume the soul of Sir Edrin; that, or perhaps he had sustained injuries from his fight with the Wendigo.
This is a popular theory, as within recent history--the past 50 years--graverobbers dug up the body of Sir Edrin to cut a finger off of the holy man or to steal and sell his bones. However, when they had dug already 10ft down, they found no bones, no signs of decay, only more dug as they dug deeper... and deeper.