On the Stolen World, there are very few true monstrous types. But when a human dies with both a strong will and evil intentions. the very high ambient magical energy will sometimes give birth to an undying wight. Normally they are found in the less populous regions where the mana level is often untapped for centuries, It is not unheard of them to pop up in large cities.
Ryenionn(or Rye for short) had the typical background of an up and coming social bastard. Prostitute mother, poverty bleh, bleh,bleh. What separated him from the pack of violent rabble was his gift for murder. realizing this at a young age, he slowly set off perfecting his art. Not a true sociopath, Rye was just talented and realized it. He was determined to perfect his art with the proper education. At 23 he finally found a thief willing to school things to there correct level of expertise.The city of Miir was just big enough for him to commit his mayhem and provide the needed contracts for him to rather quickly rise to moderate power in his field of study.
The beginnings of his downfall was a very lucrative contract on a city council man by a jealous business rival. He had never taken such a high profile target before and as his learning was from a thief and not an assassin, he did not take the proper precautions of a murder of this caliber that Ry should of. The business rival was scared of his own actions and pointed a subtle finger at him. Inquiries were made, investigations followed but nothing came of them, he was however left under a major cloud of suspicion. He planned on one more hit and high tailing it out of town. Then came what brought about his true down fall. Love.
He fell hard for a common serving wench, who was happily married. He would drink at the Broken wheel, where she worked for a living, to flirt and be with her. She rebuffed him at every opportunity. He made a meager living mugging and killing, disguising it as the werewolf attacks that perpetually plague Miir. Switching from dagger to metal claws.
Finally he confronted the serving wench on a late night trip home. He had more than murder on his mind. Unfortunately for him he was caught by a group of adventurers, who had been shanghaied into hunting the latest crop of werewolves and they were aware of the cloud over him. Lust crazed and drunk he made his best deadly strike on the groups leader as he was accosted by the adventurers.
At this point he is killed by the group or quickly hung for his crime, either course of action will cause him to turn undead and be able to seek out the group for revenge.
When first encountered he will be of middling power with a strong ability to cause critical hits, but will be no match for a full party of adventurers. Six times he will rise from the grave during a full moon to pursue his nemesis. The first couple of attacks will be in broad daylight but as he goes through his undeath rebirths he will become harder and harder to kill. His attacks will be more cunning and he will become more durable. In his last few encounters he will be more monster than assassin.