Eda is dead. Luz got stuck in the Boiling Isles, everything is chaos, but Luz goes into hiding. She stops going to school and starts training, raising a revolution against the emperor. Amity thinking that Luz went back to her world joins the Emperor's Coven, she is everything she wanted to be, till years later they find each other in battle.

I'm just doing this for fun

Luz knew her imagination tended to run away with her, but no doubt about, Amity was hiding something. An inhuman something.