The Last Immortal In The Martial Arts World

My name is Li Buxiu, and I am a casual cultivator.
One hundred thousand years ago, I passed through the tribulation for the first time.
Ninety thousand years ago, I passed through the tribulation for the second time.
Eighty thousand years ago, I passed through the tribulation for the third time.
......
Ten thousand years ago, I passed through the tribulation for the ninth time.
One day, I woke up and found that the world had changed. There were no immortals, only monks.
So, I was regarded as the last immortal in the post-immortal era.
I declare that I am not a cheat, and any cheat in front of me is scum.