Deathgasm

Deathgasm is a 2015 New Zealand dark comedy horror supernatural film written and directed by Jason Lei Howden in his feature directorial debut. The film stars Milo Cawthorne, James Blake, Kimberley Crossman with Sam Berkley and Daniel Cresswel, follows the title teenage heavy metal band who acquire an ancient piece of sheet music and unwittingly summon an evil entity known as "The Blind One".

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.