Divorce the Lord, Marry the Shadow King

Noble heiress Skye Sterling dies alone after five years of a cold loveless political marriage and constant humiliation from her arrogant husband's mistress. Reborn to her first anniversary, she uses past memories to buy wasteland that makes her a self-made billionaire, allies with ruthless shadow network heir Alistair, enters Relic Academy, outwits all her enemies' schemes, and leaves her regretful husband to build her own powerful new era.