To Poison a Predator |Tom Marvolo Riddle

Before she drank the golden elixir, Megaera Black was a mother haunted by a dying world. Before that, she was a centerpiece at a feast where she was the main course. In the House of Black, purity is not a virtue-it is a measurement of how much light can be harvested before the wick is cut.
When a manipulative Albus Dumbledore offers her a "second chance,"Megaera is forced into an unthinkable choice: save the future, or save the sons who will never be born if she succeeds.
Armed with a war-torn soul and a ledger of secrets, Megaera awakens in 1966 in the body of her nine-year-old self. Her mission is a psychological siege: stop Tom Riddle before he becomes Lord Voldemort. Not by fighting him, but by becoming the only person he learns to trust.

But salvation has a bitter aftertaste. The elixir doesn't just transport; it erases. As the faces of the sons she died to save dissolve into a grey mist of amnesia, Megaera is left with a mother's heart but no children to fill it. Her mind is a fractured mirror, and whenever the 'fixed' threads of fate are brushed, the glass shatters. She falls into violent, crushing trances-a glitch in time that leaves her dazed and confused.