Rebellious Baby: The Useless Mother Rules Another World

She transmigrates, gives birth out of wedlock, and is unloved by both her father and mother. Her husband has a whole harem of concubines and ignores her. It's all because she was useless. Then her mastery of poison shakes the world, and she dazzles everyone in the arena. Those who bully her will be bullied tenfold in return; those who hurt her will be repaid a hundredfold; those who harm her will be reduced to ashes.