Bertram

A vampire's bloodlust is inescapable. For them to live eternally requires them to take a toll from other living mortals. Blood for blood, and though this doesn't need always be fatal, the tithe sometimes weighs heavily upon a vampire, taking blood from  a living thing

To compensate, those who do not have the stomach to take it drink from animals (And even then, some have reserations), while most others take blood donations from hospitals.

While decent solutions, they still require one to drink blood constantly so as to not die.

Of course, throughout the centuries, people have sought ways to stop this, perhaps an infinite blood source, maybe curing vampirism was the way? (Not possible, by the way)

And yet, despite this, no one seems to have found a solution...

Bertram, a vampire alchemist, sought a way to fight bloodlust, to make sure a vampire never felt it in the first place, he despised having to sully his beautiful mouth with the blood of mortals or animals, and even learned the ways of alchemy to invent a cure for it in both him and his ilk.

Decades of research lead him to a leyline of magic, upon which a grand chateau and other buildings we built, inhabited by the richest, wisest, or simply luckiest people on Larutan, and soon moved into the basement with his fortune in an attempt to synthesize some way to suppress bloodlust.

It took many months and years of research, but it culminated in his finest creation, a beautiful amulet, that when worn, would allow him to never drink blood again, for it everlastingly created blood, so long as a nearby font of mana was presence.

However, Bertram hardly had time to enjoy his creation, for not long after, a terrible event befouled the chateau, killing almost everyone, cursing the ones who lived, and trapping the souls of whomever died there within the castle grounds. 

Betram was no exception, he attempted to flee, but found his amulet failing, and his flesh warping into that into a hideous monster, but when he returned, it's effects returned.

More study ensued. 

Whatever stained the chateau left a mark on the leyline as well as him and his amulet... when removed, his body would rapidly succumb to the effects of bloodthirst, and transform into a mindless monster...

And whenever he attempted to leave, the amulet would fail all the same.

He was trapped in this place filled with undeath and curses, he created what he wanted, but could not share it with the world...

Truly, a hell he did not deserve to be in.

And thus he remains in this haunted place, attempting to find a way to strengthen his amulet, find a way out, or try to break whatever curse lingers over his haunted abode, but he is not making much progress...