Painted Skin: The Resurrection Zombie Dogs (2012)
Clip from Painted Skin: The Resurrection. According to demon lore, it takes hundreds of years to attain human form. Even then, lacking a human heart, a demon cannot experience the true pains and passions of existence. However, there is a legend that if a pure human heart is freely offered to a demon, it can become a mortal and experience true life. -- Huayi Brothers Media Corporation