Paarthurnax, the Old One

Flying, trample
Humans your opponents control get -1/-1.
Whenever Paarthurnax and at least one other
Dragon attacks, destroy target non-Dragon
creature an opponent controls. If it was a human,
put it onto the battlefield under your control.
When Paarthurnax dies, you may shuffle it into
its owners library.
What is better - to be born good, or to overcome your
evil nature through great effort?