I Rely on the Immortal Realm Food Forum to Dominate the Lower Realm

Three years after transmigrating, Lin Yan unexpectedly unlocks the Immortal Realm Food Forum, which can only be accessed once a year for six minutes and twenty seconds. He counts down the seconds to browse posts and extract useful information, starting with the art of fasting, leveraging scraps from the forum to maneuver among various factions, cleverly seize ancient treasures, learn secret immortal techniques, profit from the war between immortals and demons, and carve out his own path of cultivation. — Description from novelcodex.org