Dragon Ball Z 17 features story and art by Akira Toriyama.

Now in his Perfect Form, Cell is stronger than any creature alive - even the muscled-out new form of the mighty Saiyans. Finding no competition on Earth, Cell invades a TV studio and gives the world an ultimatum: produce a fighter who can beat him in one-on-one combat, or he will methodically slaughter every living thing! But does the human race - or even the Saiyan race - have a champion who can go up against Cell? Plus the alternate-timeline story of Trunks' origin!