Killian Dain Beast of Belfast Entrance Music Theme Song Download is available for free in mp3. Killian Dain Beast of Belfast. Killian Dain is a famous people who is best known as a Wrestler. Killian was born on February 20, 1985 in Belfast, Ireland. He defeated fellow professional wrestler Rich Swann in his debut WWE fight in November of 2016. Killian Dain is a member of famous Wrestler list. Professional wrestler known for his work with the WWE.