Avenged Sevenfold didn't release any studio albums.
Despite his death , Avenged Sevenfold continued on with the help of now-former Dream Theater drummer Mike Portnoy and released and toured in support of its fifth album Nightmare in 2010 , which debuted on the top spot of the Billboard 200 , Avenged Sevenfold 's first number one debut .	Mike Portnoy	Mike Portnoy	Dream Theater	Dream Theater	Nightmare	Nightmare (Avenged Sevenfold album)
Nightmare is the fifth studio album by American heavy metal band Avenged Sevenfold .	Avenged Sevenfold	Avenged Sevenfold	Nightmare	Nightmare (Avenged Sevenfold song)	heavy metal	Heavy metal music
