Metal Immortal

Original title: ฤทธิ์เหล็กไหล

Directed by Winai Yuenyong

Yont has an amulet buried in his body which makes him invincible. Piak wants to buy the amulet but Yont won't sell and he decides to hide it in his son's bodies making them invincible. But Piak will spare nothing in order to get the amulet.