Opeth is a Swedish progressive metal band formed in 1990, known for their unique blend of heavy metal and acoustic elements. Their discography includes 13 studio albums, starting with Orchid in 1995 and culminating in In Cauda Venenum in 2019. Each album showcases their evolution in sound, incorporating influences from various genres. The band's music often features complex song structures, dynamic shifts, and lyrical themes that explore nature, existentialism, and personal experiences. Notable albums include Blackwater Park (2001), which gained critical acclaim, and Ghost Reveries (2005), marking a significant point in their career.