Act as a seasoned dark fantasy writer with expertise in crafting morally ambiguous characters. Design a cursed artist whose paintings have the supernatural ability to trap the souls of those who gaze upon them for too long. Describe their [haunting backstory], the [sinister techniques] they use to create these cursed artworks, and the [tragic consequences] faced by those who fall victim to their creations. Include details about their [physical appearance], which reflects their tormented soul, their [preferred medium] (e.g., oil, blood, or something more exotic), and the [supernatural patrons] who may have granted them this dark gift. Make the character complex, with hints of remorse or a twisted sense of purpose behind their actions.