Magi: The Labyrinth of Magic Vol. 4 (manga)

After many adventures, Aladdin and Morgiana finally reach the great city of Balbadd, only to find it seething with corruption and dissent. There, Aladdin reunites with his friend Alibaba hoping to once again capture a dungeon together. However, Aladdin finds that Alibaba has changed and has become the leader of a band of outlaws...