I'm an Eighty-Year-Old Female Cultivator, So What's with This Harem System?

[My first female-dominant cultivation and System novel, featuring adorable contrasts, farming and cultivation, and a lighthearted power fantasy! Follow and bookmark!] Ning Wan'er was an ordinary college student in the twenty-first century, but she unexpectedly transmigrated to a strange world where people with spiritual roots could cultivate immortality. She was born into the Ning family and tested as having four spiritual roots: metal, wood, water, and fire. Her aptitude was mediocre, and without a fortuitous opportunity, she would never break through to the later stages of Qi Refining in her lifetime! And so, even at the age of eighty, Ning Wan'er was still at the peak of the sixth level of Qi Refining. She had been stuck at that bottleneck for a full fifty years! With only twenty years left to live, she was already planning to buy a plot of land and wait to die when she was suddenly bound to the “Wives and Concubines Galore System”! Taking a husband gives her one chance to draw a prize. Having a child gives her another chance, and she can also copy the destiny trait entries on her children. The affection points she receives from her husband's descendants can be used to level up. Ning Wan'er looked at her wrinkled face in the mirror and shook with anger. “You've got the wrong person, right? What unmarried young man would marry me? And even if there were one, who'd dare consummate the marriage?” Until one day, the cultivation world's most outstanding young men lined up to call her Madam…