Shendalyn Shawn's family comes from a long line of Aroden worshipers (turned to Iomedae after his death) who fled to Talingarde during the empires civil war to escape the predations and persecution of the rising diabolists.
From their the house suffered a slow and painful death as each generation fell into squandering its money in hopeless escapades into toppling House Thrune and returning to Cheliax. As the years went on only Shendalyn, the bastard son of the house patriarch and a calistrian prostitute, was eligible to head the house.
At first this did not seem like such a bad deal for the house. Intelligent, charming, and as physically apt as any male the house has ever had Shendalyn fell madly in love with and married a beautiful and equally intelligent noblewoman whose business sense might have dragged the house out of the mountains of debt it had accumulated over the years.
She died tragically during the labor of their first child, and with her his son.
This marked the beginning of the final end to the House of Shawn and of Shendalyn himself. He took to drinking, gambling, taking drugs, performing all sorts of death defying risks and forbidden pleasures in some poor attempt to maintain some semblance of life. To him, when his dearest Shaya died his life ended as well. He was a walking corpse getting into fights in the street only to wake up bloodied, bruised, and suffering a serious hang over just before releasing his frustrations in the nearest brothrel.
Some years passed as he was forced to sell off mroe and more of his families assets to feed his habits until one day he decided to take up an even more dangerous hobby; the summoning of devils and the worship of Asmodeus.
It was small for the most part, a Lemure here, a Fiendish Hunting Eagle there. But then, as the rituals increased in complexity so too did his dark desires. He started summoning more pwoerful devils, more exotic lovers and solving petty vengeances with dark magic. It was after a long and sweaty night satisfying dark pleasures with a pair of erinyes's that one whispered into his ear.
"You can have her back you know. Our lord has the power, he can pluck her soul from the river of souls itself and save her for you, preserve her, perhaps, if you serve well, even resurrect her for you. All you have to do is open yourself up to us. Let the legions of hell loose to restore order to this chaotic realm. Would you do that? Would you do that for her?"
How could he refuse?
It took nearly the entirety of what was left of his family's fortune and hours of trial and error but with instruction from his infernal tutors he finally perfeceted the ritual that would turn him into a living portal, a vessel for the power of hell.
When it was done he was covered in blood with fell voices in his head surrounded by fearful guards. All around him were the chewed, mutilated, and butchered remains of his servants and family members. On the walls were infernal inscriptions written in blood and in the surrounding village hundreds of people turned up missing as others described terrible monsters fleeing from the manor and into the wilderness.
It did not take long for town criers to let all of Taligarde know of Shawn the Butch, Shawn the Blasphemer, Shawn the Devil, and Shawn the Cannibal. This event was one that helped trigger the asmodean scourge. Despite the danger they have saved Shendalyn's execution for a very special and very public spectacle. This may prove to be the folly that desotroys them utterly.
For now Sendalyn is a haunted and broken man who flips from manic glee one moment, charming noble the next, and rampaging demon in moments. He is handsome with a wiry and athletic build as much a legacy of his families history as swordsman as his elven heritage.