Dragon Ball Z, Volume 22, Paperback/Akira Toriyama

The Lord of Lords, mightiest of the deities, has come to Earth - and he needs the help of Goku, Gohan and VegetaFrom across aeons of time, from across the stars, the evil wizard Bobbidi has returned, gathering chi energy to resurrect the imprisoned djinn Boo, the most powerful creature that ever existed.