I Became My Own Family’s Ancestor

After ten thousand years and a heavenly tribulation, a legendary cultivator breaks through the gates of heaven and returns, only to learn he is now worshipped as the founding ancestor of the family he built. But his descendants are ruled by a cruel patriarch, and a demon lord is about to invade the mortal world. Anyone who hurts his blood will die. With one sword in hand, he crushes the demon army and defends his legacy.