What makes Twilight of the Gods by Bathory notable?

This album is crucial for its influence on the viking metal genre, blending elements of black and thrash metal with lyrical themes of Norse mythology. Its ambitious length and structure paved the way for future metal acts to explore similarly grandiose concepts, leading to critical acclaim and establishing Bathory as a seminal force in heavy metal history. Released in 1991, 'Twilight of the Gods' was Bathory's sixth studio album and marked a significant shift towards a more melodic and epic sound. Following the groundbreaking 'Hammerheart' (1990), this album solidified their role as pioneers in viking metal while showcasing their evolution from raw black metal roots.