Sect Patriarch, I've Somehow Become a Coffin Lid

In his previous life, Ye Lingxiao was a generation-defining Demon Emperor. To escape reincarnation, he shackled his own cultivation, and when he awoke again, ten thousand years had passed. In this life, he has become a coffin lid, yet people mistake him for an immortal sword cultivator of the righteous path. As his seals are gradually undone, a young man carrying a bronze coffin emerges into the world. Life and death are nothing to me. If you won't submit, I'll fight. Can all the gods and Buddhas across the heavens withstand a coffin lid? Everyone, the times have changed. Come and try my coffin lid!