My Supermarket for a Fairy

Caden Morgan, disciple with damaged Spiritual Root. Saves Jade Pool Maiden Crystal Lynn, unlocks two-world shuttle system. Modern items are immortal treasures. Uses them to help Crystal, sister-in-law Autumn Lynn, Master Vera. Plotted against by Warren, Elder Rhodes, colluding with Bloodfiend Sect. Storms demonic palace, uses modern goods to defeat sect master, saves loved ones. Caden reaches Nascent Soul, lives with Crystal, Autumn, Vera, establishes stable power.