Fairy Tail Zero: Mavis Vermilion (Part 8)

This eighth part will be on Episode 9 where Mavis prepared to cast Law, a powerful magic spell learned from Zeref to free Yuri from the blue dragon and despite Zera's warnings of the spell's adverse effects, Mavis successfully performs the spell and destroys the Sirius Orb that was controlling Yuri which cause her to fall unconscious.