He was never satisfied. Kill after kill only suppressed the urges. He thought coming up with new ways to hurt them would help, but each release lasted less than the last.
Until he saw her.
She was perfect and she would be the one that would set him free.
She had her whole life in front of her but couldn't see that it was worth living.
When she found herself stuck in the house of a thousand hells, it was up to her to fight for her life and see it was worth living for.
But nobody had ever made it out alive and he wasn't going to let her be the first.