Envy reveals himself as Hughes 's murderer , causing Mustang to lose control and incinerate him until he returns to his parasitic form .
Edward 's gang encounters Envy shortly before Mustang arrives and destroys the attacking puppets .
Envy reveals himself as Hughes 's murderer , causing Mustang to lose control and incinerate Edward until Edward returns to Edward 's parasitic form .
Edward 's gang encounters Envy shortly before Mustang arrives and destroys the attacking puppets .