Start! We Lost a Great Emperor

Swallowing a golden elixir into my belly, my fate is determined by my will... The entire universe was invaded by extraterrestrial demons, and the sealed ancestral star domain became the last pure land of the human race... But the seal will eventually be broken one day... Darkness will eventually come... Waiting for the fate of the Ancestral Star human race... The protagonist who obtains the system will be a variable. Whether he can lead the Ancestral Planet humans to rise quickly and face the darkness that will come at any time...