He becomes an assassin and tries to kill Daredevil and Black Widow .
David Angar volunteers for an experiment that subjects his vocal cords to hypersound , granting him the ability to scream loudly and cause hallucinations .
David Angar becomes an assassin and tries to kill Daredevil and Black Widow .
David Angar volunteers for an experiment that subjects his vocal cords to hypersound , granting him the ability to scream loudly and cause hallucinations .