Through Time Travel, I Became the Eldest Brother of the Sect

No system I traveled through time and became the senior brother of the Immortal Cultivation Sect The first time he practiced, he broke through from the golden elixir stage to the Nascent Soul stage. Go out to rescue the junior sister who claims to be privately engaged to me for life. But got an unexpected opportunity At the critical moment when the demon sect invaded the sect But I started to make breakthroughs inexplicably The elder had no choice but to hide me at the bottom of the back mountain lake This hide That's a hundred years when i wake up The sect has long been reduced to ruins...