Unnamed

THANK YOU QWERTYYYYYYYYY
She's a necromancer with actual morals, so instead of experimenting on dead bodies, she worked as a freelance "doctor" of sorts. She knew almost nothing about actual medicine, but she had lots of spare time and a passion for anatomy and magic, bringing back the dead familiars and pets of dragons who came to her for help. She just had one rule: she'd never bring back a sentient being, knowing that there was a high chance of them coming back wrong.
Years passed, and she was highly successful. However, other necromancers began to envy her for her talents, and she soon found herself awakening to undead beasts attacking her every night. She knew that the zombies weren't of her own creation, since all of her works were freshly deceased and thus not so decayed, but the public blamed her for the sudden arrival of the zombies, driving her out of town.
She was connected to her creations on a spiritual level, and thus she felt great pain when her once loyal clients began to slay their newly revived pets, rekilling them out of fear and spite. Her magic grew weaker with each death, until she couldn't even make a flower blossom. She knew that the zombies sent after her would eventually kill her, so she broke her single rule and turned herself into her final experiment. She was killed, only to rise from the grave days later, now an abomination of resent and undead power.