Guarding a Junkyard? I'm Guarding the Immortal Sect's Treasure Vault!

Su Fan transmigrated into a fantasy world and became the manager of Tai Xuan Sect's dump. He unexpectedly bound himself to an utterly useless “Purification System.” Just when he felt his life was hopeless, he was shocked to discover that the System could actually be used this way! [Detected that the Host possesses nine low-grade miscellaneous spiritual roots. Please choose the spiritual root to “purify.”] [“Incomplete Sword Spiritual Root” selected! Purification in progress… Congratulations, purification successful! The Incomplete Sword Spiritual Root has evolved into a “Chaos Sword Embryo”!] [Detected that the Host's final disciple has an unrighteous heart!] [Purification in progress… Purifying the Host's final disciple's qualities of “filial piety,” “loyalty,” and more. Congratulations, Host, you have gained a deeply loyal and filial final disciple!] [Detected a trace of “chaotic spiritual energy” within the “broken stone.” Purify it?] [Purification in progress… Congratulations, Host, the “broken stone” has evolved into a “Chaos Immortal Stone”!] Trash? Worthless? In my eyes, Su Fan's, this world is full of treasures and geniuses!