Key of Hope - S2.E32

After a narrow escape from Erza Knightwalker, Natsu's group decides to head to the capital of Edolas on their own to save their friends, despite warnings from the Edolas Fairy Tail. However, they soon find themselves guided by Lucy Ashley, Lucy's Edolas counterpart, and Natsu and Wendy are shocked to discover that their magic does not work in Edolas.