Trapped for a Hundred Thousand Years, I Am the Immortal Immortal

FantasySystemTravel Ling Shutong was thrown into a secret realm by the system and told to stay there for a hundred thousand years. Immortal kings were everywhere outside and the real immortals were inferior to dogs. He smiled: I know this question, there must be a world of low demons outside, waiting for me to preach. System: Please stop daydreaming, host. One person and one dog spent two years in a secret place. He thought he would continue like this until one day, a three-year-old girl fell from the sky—— Then a hundred days later, she left again. Later he discovered that there would always be people coming to this secret realm. Someone will always leave. And he will eventually become the immortal who is not stained by dust.