"You've decided to overthrow the king and you've brought the queen onto your side. Things are moving along nicely, but there's a slight hitch this week," Yennefer said to her class. "Some asshole of a sorcerer named
Stregobor has arrived in the kingdom. Stregobor believes firmly in 'the Curse of the Black Sun,' whereby princesses born under a solar eclipse are cursed to be evil and bring forth the goddess Lilit upon the world, blah blah terrible internal mutations blah blah end of the world. It's unclear whether this is a real thing or not; most other sorcerers honestly think Stregobor is cracked up. Unfortunately, he is also very powerful, so...it's a problem.
"Now. It just so happens that the eldest princess of your kingdom, the one you're planning to install upon the throne, was born under a
lunar eclipse. Stregobor is concerned. He wants to verify for himself that she is not touched by the Curse of the Black Sun...which he can only do by examining her insides, AKA: by autopsy. A minor loss for the greater good, you understand, of course...except you don't. Not only are you protecting an innocent life, you
need that girl. If you casually let Stregobor kill her on the principle that you have five more princesses to put on the throne, her mother, who you need on your side, will never trust you again.
"Lucky for you, the king, still oblivious to your plans, can't be bothered to deal with foreign sorcerers himself." Yennefer bared her teeth in a smile. "That's my job. So he has sent Stregobor to me, and therefore, to you. You can't kill him, tempting though it may be. He's too powerful and it would raise too many questions from the Council. So: talk him out of it."