 During this time, an evil life form called Cell also emerges and, after absorbing two of the Androids to achieve his "perfect form", holds his own fighting tournament to challenge the protagonists.After Goku sacrifices his own life to no avail, Gohan avenges his father by killing Cell.Seven years later Goku, briefly revived for one day, and his allies are drawn into a fight against Majin Boo.