Thomas Börje Forsberg, commonly known as Satan, is a Swedish musician and songwriter, best known for his work in the heavy metal genre. He gained prominence as the lead vocalist and guitarist of the band Bathory, which he founded in 1983. Forsberg's music often features themes of mythology, fantasy, and darkness. Forsberg's influence on the metal scene is significant, particularly in the development of the black metal subgenre. His innovative approach to music and lyrics has inspired countless artists and bands, making him a key figure in the history of heavy metal. He passed away in 2019, leaving behind a lasting legacy.