This is happening for everyone. Its a intential design that's flawed by Maxis themselves. Everyone you don't play as whenever you go to the Realm of Magic will result in Bella Goth, Bob Pancakes, and even your own Sims becoming Spellcasters. You didn't ask for, you didn't choose this, and yet there it is. They need to stop this. No one wanted this. Too many random Sims are becoming Spellcasters. I just want Sims I say to become Spellcasters. As in I control them and tell them to ask one of the three teachers. Honestly annoying beyond disbelief. Even your played households become Spellcasters. No one is safe. I can understand if a couple of generated townies become one to populate the Realm of Magic but seriously stop making every single Sim into a Spellcaster. Gonna have to uninstalll this scam DLC and take action against Maxis and EA for a refund if they don't.