Celtic Frost was a Swiss extreme metal band formed in 1984, known for their innovative blend of heavy metal, thrash, and avant-garde elements. The band was founded by guitarist and vocalist Tom G. Warrior and bassist Martin Eric Ain. They gained recognition for their influential albums, including "To Mega Therion" and "Into the Pandemonium," which showcased their unique sound and artistic vision. The band's music often incorporated dark themes and complex arrangements, setting them apart in the metal genre. Celtic Frost's impact on the development of black metal and doom metal is significant, inspiring numerous bands and musicians in the years that followed. They disbanded in 1993 but reunited in 2001, releasing new material before their final breakup in 2008.