"A wealthy entrepreneur who spends more than $2 million a year and who has received blood from his teenage son and other young persons in his quest to achieve immortality, or at least stave off aging, reports that he has developed a rare disease that he says is causing “My stomach to eat itself.”
Biohacker Bryan Johnson, founder of online payments company Braintree, announced on social media that he has been diagnosed with autoimmune gastritis (AIG), an incurable autoimmune disease.
In a lengthy, nearly 2,000-word post on X, Johnson said, “My stomach is eating itself,” but declared that is “going to try and solve it.”
“AIG causes irreversible damage: nutritional deficiency, anemia, and over a long horizon, elevated cancer risk,” Johnson said. “When AIG is discovered today, standard medical care concedes defeat, stating that nothing can be done except managing the condition, no matter how awful or lethal the effects.”"
Makes me think of this based scene: https://www.youtube.com/watch?v=KjFIj_p86zo
Interesting redefinition of "nephilim". I think there's a better ancient word for your concept but for now "NPC" will have to do.