10 Most Underrated Flash Villains

10. Murmur

One of the more unsettling villains on this list, Murmur's MO is plucked straight out of a horror movie (or a particularly dark street-level comics storyline).

Dr. Michael Amar was once a renowned surgeon who turned to murder due to his untreated schizophrenia. His killing spree saw him cut out his victims' tongues in a twisted attempt to silence them and any voice he would come across. The wave of violence came to a close after Central City police officers Fred Chyre and Joe Jackham captured him and he was convicted due to his urge to confess, as well as evidence supplied from Barry Allen.

He was imprisoned in Iron Heights and sentenced to death, but his unique blood makeup made him immune to most toxins, including lethal injections. During his incarceration, he cut out his tongue and sewed his mouth shut.

Later on, he became a fully-fledged villain and committed heinous crimes such as killing inmates and guards in Iron Heights using a virus outbreak, attacking Metropolis alongside the Secret Society of Supervillains, and attacking police officers in Gotham City.