Master, I Really Don't Want to Leave the Coffin

You woke up from your deep sleep and fell into deep thought while looking at the decent people sharpening their knives beside the coffin. You are actually a demon king, an immortal being who once dominated the world for a lifetime. Unfortunately, you are already a thing of the past, and your glory is no longer there. In times of crisis, you awaken the system. You are invincible in the coffin. The demonic flames are surging into the sky, your strength is overwhelming the mountains, your every move is stained with blood in the dusk. Looking at the setting sun, you sighed arrogantly at your late disciple. "Disciple, as a master you will never leave the coffin."