Randy Orton became a prominent Superstar during this period, becoming the youngest world champion in WWE history at the age of 24, defeating Chris Benoit at the 2004 SummerSlam event. Dubbed "the Legend Killer," he would go on to have feuds with legendary superstars such as The Undertaker and Hulk Hogan, facing them at WrestleMania 21 and the 2006 SummerSlam event, respectively. Along with fellow Superstar Edge, he would form the villainous tag team Rated-RKO and find success in the tag team division. After returning to singles competition Orton became a multi-time WWE Champion.