The Return of the Demon Lord Kills the God with One Strike at the Beginning

I was originally a demon from another world, but when I opened my eyes, I became a body-refining loser who could be bullied by everyone in the lower world. My family took away my resources, and my clan members laughed at my stupidity. What they don't know is that I have already integrated the supreme sword intention into every inch of flesh and blood. When the former enemy reaches its peak and is worshiped by thousands of people. I draw my sword from the shadows—— "No one in the three thousand worlds can stop this sword."