The Music Meister uses his ability to control minds in an effort to take over the world.
Did You Know?
Black Canary and Batman still have their protective earpieces after being put into The Music Meister's elaborate Death Trap, even though The Music Meister could have easily removed them between when they were both rendered unconscious and when they awoke tied up in the trap, including their transportation. See more
Referenced in The Flash: Duet