A War Between All Races? I Come to the Battle Riding on a Coffin

"Return from Time Travel and Fly with the Earth!" Come back through time and crush all races! "Earth! I'm finally back!" "What? In the past three years alone, we have been invaded by thousands of races and fought in chaos? Isn't this a good opportunity for me to integrate back into the human race?" "The foreign race is the only one to be respected, while the human race is weak? No, right? Humanity is the master when I leave!" Good news: The ancestor of the demonic path traveled back to earth riding a coffin! Bad news: I am extremely weak, and all I have left is a coffin. It just so happens that the despicable tribes actually pressed the humans to the ground and rubbed them!