How do you write a good bridge for a metal song?

Bridges are transitions. Musically, this is your opportunity to get creative and bring a different tone, change the beat, change instrumentation, or add harmonies. When it comes to the lyrics, a bridge should present a question, answer a question, or emphasize the themes of the song. If the main idea of your song is, "Life is hard, but we can make it," the lyrics on your bridge might be, "Are we going to get out," or, "We gotta get tough." In terms of melody, a bridge can echo a theme or idea from the verse or chorus, or it can introduce a new kind of musical pattern. The bridge is really your place to get creative!