Most metal bands apply intro tracks to greet and set the mood before their music takes form. Metallica used ‘The Ecstasy of Gold’, which readied their audiences and became somewhat their trademark (which suits their country-metal).
Death metal on the other hand went a bit further. From Deicide’s goats in anguish, to Carcass’ surgical salute, to Morbid Angel summoning the Ancient Ones; it’s become standard to employ sounds outside of what bands typically use in their songs. What are your favorite intros?