Complex sentence: After a heated argument with Theresa, Alex, in a fit of rage, wishes that her parents had never met; unfortunately, the smuggled full-wizard wand and spell book, which Alex was holding at the time, grants her wish.
Split into simpler sentences: After a heated argument with Theresa, Alex, in a fit of rage, wishes that her parents had never met. The smuggled full-wizard wand and spell book, which Alex was holding at the time, grants her wish.