Bury the God's Coffin, Bury the Sky, Hide the Earth, Bury All Living Beings

I have a coffin that can be used for burial in heaven, on earth, and for burying all sentient beings. "Use me as a chess piece, enter the game with my own body, and win half the game. In this chessboard of three thousand worlds, let's see how I, Long Yan, can break the game!" Many years later, a purple figure flashed out of the boundless land beyond the three thousand worlds, looking at the horizon and muttering to himself. "Is all this really worth it..." "I am just a speck of dust in this world, how can I become the lord of all living beings?"