Magi: The Labyrinth of Magic Vol. 20 (manga)

The battle for Magnoshutatt reaches its devastating climax as the terrible Dark God takes shape and powerful Metal Vessel users from across the world arrive to join the battle. Defeating the Dark God will require Aladdin and Yamraiha to confront Mogamett and uncover his secret. They may also find the sacrifice required for victory too much to bear.