On March 10 2017, Blume announced his first Best-Of Legacy and the "Kollegah Gold-Award", a compilation of all his albums released under Selfmade Records.  Eight days later, during a concert of his "Imperator"-Tour in Leipzig there was a violent incident onstage. As it's often the case with rap concerts, a rap battle between two spectators should be performed on the stage. One of the participant tried to grab Blume's sunglasses. As a result Blume shoved the man, kicked him and punched him in the face. A few hours later videos of the attack were uploaded to YouTube and Facebook.  An uninvolved person filed a lawsuit against Blume.   Legacy was released on July 14, 2017 and peaked on number two in Germany.