“Ah.”

Yes. He could speak to his world’s correlation to that easily enough, even though it makes him somewhat queasy to think about what Voldemort did to his soul. And to him.

“In the Wizarding world, you can forcibly remove a piece of your soul through acts of murder, turning it into a Horcrux. The Horcrux is combined into another object or creature. Once hidden thusly, the owner of the fractured soul has the fragments to rely upon should death destroy the rest. In other words, a chance at immortality.”