At WrestleMania XXIV in March, Edge lost the World Heavyweight Championship to the Undertaker when he tapped out to the Hell's Gate. In a WrestleMania rematch, The Undertaker defeated Edge once again at Backlash to retain the World Heavyweight Championship. Following Backlash, the Undertaker was stripped of the World Heavyweight Championship by Vickie Guerrero for using the Hell's Gate, which she previously banned. After winning a tournament to determine who would face the Undertaker for the vacant championship, the two met at Judgment Day, which ended in Edge losing via countout. However, since championships cannot change hands via countout, no champion was crowned. A rematch was scheduled for One Night Stand, in a TLC match. On the May 23 episode of "SmackDown", Vickie Guerrero added a stipulation that stated if the Undertaker were to lose, he would be kayfabe banished from the WWE. At One Night Stand on June 1, Edge would defeat the Undertaker after interference from Chavo Guerrero and Bam Neely, in the process winning the World Heavyweight Championship for the third time. Since he lost, the Undertaker was also forced to leave the company.