10 Reasons The Undertaker Rivalry Was CM Punk's Greatest Feud

For more than 20 years - longer than the careers of many professional wrestlers - The Undertaker was undefeated at WrestleMania. Other stars took the mantle of being the face of the company or the world champion, but on the grandest stage of them all, no one could come close to the Dead Man. Until Brock Lesnar came along to shock the world at WrestleMania XXX, Taker's continued dominance was the only real certainty in WWE. In the spring of 2013, CM Punk was in a dark place. His mammoth reign as WWE Champion had come to an end at the hands of The Rock and he was frustrated with his stock in the company. For him, there was only one prize bigger than the title he had held for so long - the Streak. Punk's claim that he was "the best in the world" did not hold true at WrestleMania and, despite all of Punk's achievements, he simply had to change that. The sudden death of Undertaker's former manager Paul Bearer added a dark edge to the rivalry, allowing Punk to flourish as not just a heel challenger to the Streak, but as a genuinely despicable character. Feuding with the Phenom brought something unique and different out of CM Punk, ensuring that the titanic, personal WrestleMania clash between the two men marked the culmination of the Straight Edge Superstar's greatest ever rivalry.