Complex sentence: During his stay at the palace Richard comes to terms with the fact that he has the gift of magic and moreover discovers he is a War Wizard, one who has the gift of both additive and subtractive magic.
Split into simpler sentences: During his stay at the palace Richard comes to terms with the fact that he has the gift of magic. He discovers he is a War Wizard: one who has the gift of both additive and subtractive magic.