I'd like to know the name of a book written no more recent than the year 2000 (probably a bit older.) It includes only two themes that I can recall:
- The main character is exiled for not having a magical power in a world where everyone else has a single magical power. (At the conclusion of this book it is determined that the main character's magical power is immunity to the magical powers of others.)
- A monster asks a wizard who answers a single question per individual whether he has a soul or not and is told that if he is asking that question, he does have a soul. The monster is then tasked with guarding the wizards tower.
I believe this book is part of a series. Can anyone identify it?