What makes Regressus by Mystic Prophecy notable?

'Regressus' received positive reviews for its energetic compositions and thematic depth, helping to establish Mystic Prophecy as a notable act in the power metal genre. The album contributed to the band's growing reputation, leading to appearances at major festivals and influencing emerging bands in the scene. In 2003, Mystic Prophecy released 'Regressus' as their third studio album, following their 2001 breakthrough 'Blessed Are the Strong'. At this point, they were solidifying their presence in the European power metal scene, expanding their fanbase while honing their signature sound.