Jade Dynasty

Aah, I see... You were a white wolf who lived deep within the moutains. Over thousands of years, your body evolved into that of a human's, and so you left your mountains, to wander and explore the lands of the humans. There, you inexplicably fell in love with a man 3,000 years your junior. He dumped you a six months later. Now in more pain than you'd felt in your millenia of existence, you brought your wrath down upon humanity and brutally slaughtered every last one you could find. Then a Taoist priest killed you. That was your previous life...