新沙洞老虎
Mastermind is the third mini-album by South Korean boy band Beast, and was released by Cube Entertainment on September 30, 2010. The lead single "Soom" is composed by Shinsadong Tiger and Choi Gyusung with lyrics written by both the composers, Rado and member Yong Junhyung. The song "Break Down" is created by Lim Sanghyuk and Lee Joohyung.