Metalcore is a broad fusion genre of extreme metal and hardcore punk. The name is an amalgam of the names of the two genres, distinguished by its emphasis on breakdowns, which are slow, intense passages that are conducive tomoshing. Pioneering bands, such as— Hogan's Heroes, Earth Crisis, and Integrity, —are described to lean more toward hardcore punk, whereas latter bands—Killswitch Engage, Underoath, All That Remains, Trivium, As I Lay Dying,Bullet for My Valentine, and The Devil Wears Prada —are described to lean more towards metal. Sepultura, who has been credited to "laying the foundation" for the genre, and Pantera, who influenced Trivium, Atreyu, Bleeding Through andUnearth, have been influential in the development of metalcore.
When the earth is changed into a humid dungeon,
In which Hope like a bat
Goes beating the walls with her timid wings
And knocking her head against the rotten ceiling;
When the rain stretching out its endless train
Imitates the bars of a vast prison
And a silent horde of loathsome spiders
Comes to spin their webs in the depths of our brains,
All at once the bells leap with rage
And hurl a frightful roar at heaven,
Even as wandering spirits with no country
Burst into a stubborn, whimpering cry.
— And without drums or music, long hearses
Pass by slowly in my soul; Hope, vanquished,
Weeps, and atrocious, despotic Anguish
On my bowed skull plants her black flag.