Complex sentence: She runs away from her gang and Uncle Bracken and lives with her human relatives, only to go back when Circle Daybreak asks Jez to go on a dangerous mission: to fight her worst enemy, best friend, and soulmate Morgead Blackthorn for the Wild Power.
Split into simpler sentences: She runs away from her gang and Uncle Bracken to live with her human relatives. She only goes back when Circle Daybreak asks her to go on a dangerous mission: to fight her worst enemy, best friend, and soulmate, Morgead Blackthorn for the Wild Power.