FAIRY TAIL Vol 16

From the Kodansha edition

A TEAM OF DRAGONS The dark guilds have allied, and the only thing that Fairy Tail can do to stop them is to ally with three other guilds and try to take on the most powerful wizards in the underworld. But the dark guild wizards won't wait for our heroes to make the first move! This volume begins the epic Nirvana storyline! Includes special extras after the story!

Source: Penguin Random House API