Waltari is a Finnish band from Helsinki combining alternative metal, progressive metal, death metal, hard rock, heavy metal, hip hop, industrial, pop, punk, symphonic metal, techno and thrash metal styles.Most of the band's music is written by Kärtsy Hatakka. Finnish metal musicians who started their international career in Waltari include Kreator's Sami Yli-Sirniö, Roope Latvala of Children Of Bodom, and Janne Parviainen of Ensiferum.

Source: Wikipedia (https://en.wikipedia.org/wiki/Waltari)