I Have Been Undercover in the Demon Sect for Thirty Years and I Became the Demon Ancestor

After traveling through time and becoming an undercover agent, lurking in the magic gate, Xu Le was so panicked that his only choice was - Gou. I will live forever... Until the sea is dry and the stone is rotten... Just when Xu Le thought he was going to live in poverty for the rest of his life, the sign-in system was activated. Sign in in front of the Stone Statue of Demon Ancestor and receive the [Heavenly Demon Sutra]. Sign in in the Demon Cave and obtain [Immortal Demonic Body]. Sign in at the Underground Fire Vein and get [Ghost Fire]. Sign in at the Tibetan Scripture Pavilion and obtain the [Tao Heart Demon Planting Technique]. … Xu Le has been waiting for the righteous coalition forces to attack the Demon Gate. He has been waiting for three years and three years and three years and three years and three years... He became the ancestor of the devil!