Responses

I was just being sarcasm, the truth is that's not all her kids only the mc. Kids with black rings was the children from the exiles, they were treated so low as they are lower in rank (Rank determine the Power) Black rings are no different from ordinary human, they can't protect themselves from higher ranks. The racism here are on another level, black rings was used in the lab for experiment, and after so many attempts they succeded on injecting the blood of Yue (Mc's mother). She was imprisoned because of her immortaly and people from higher ups used her blood to achieve immortality.
I think the mom hid her son to have a black ring but in reality he probably has a rainbow ring like her, to protect him. So all the kids eith black rings are her children?