FAIRY TAIL Vol 10

From the Kodansha edition

SHADOWS OF THE PAST Erza Scarlet is the most kick-butt woman wizard in Fairy Tail, but in the past this indomitable fighter was . . . a slave? Now she finds out hat her old companions have completed the evil device they were forced to build while held in slavery: the Tower of Heaven. What’s more, their wicked master requires a sacrifice: Erza! Includes special extras after the story!

Source: Penguin Random House API