Scorpius nodded. "Lord Voldemort. An evil wizard of immense power. He destroyed a lot of lives, muggle and magical, in his quest for power and immortality. And he had followers.. Death Eaters. My grand-aunt Bella is one."
He sighed, taking a few breaths since this was a difficult subject. "Harry. Harry Potter. Voldemort tried to kill him as a baby. It backfired. Long story short, Harry defeated him 17 years later, and our world was safe again."