Lucy Fire - S3.E13

Lucy and Hikaru’s battle interrupts Natsu’s battle with Ultear, leading Natsu to help Lucy and reform their old team while Ultear leaves with Zeref. Hikaru takes control of Lucy’s body using his voodoo-like cursing magic, which Natsu and Happy take advantage of once they obtain Hikaru’s voodoo doll by lighting it on fire, turning Lucy into a living fireball, and throwing her at Hikaru, defeating him.